Friday, February 12, 2010

True and false about the periodic table!?

True or false?








1.Sodium is one of the transition elements.


2.Lithium is an alkali metal.


3.Iron is a transition element.


4.Xenon is a non-metal.


5.Copper is an alkaline earth metal.


6.Carbon is a non-metal.


7.Calcium is a transition element.


8.Zinc is a transition element.


9.Oxygen is a non-metal.


10.Tungsten is an alkali metal.True and false about the periodic table!?
this is something you need to do on your own. Go to this periodic table





http://www.chemicalelements.com





all the answers are there. plain as day.True and false about the periodic table!?
column 1 alkali metals


column 2 alkali earth metals


column 18 noble gases


column 17 halogens


central section are transition metals


there is a zig-zag line that separates the metals (left) and the nonmetals(right)metalloids touch the line





Now use the periodic table and see for yourself
6 and 9 are true. don't know the rest off hand.

True and False Math Questions?! Please Help?! 10 Points to best answer!?

Determine whether each statement is true or false. Explain your reasoning.





1. The graphs of y = 3x - 5 and y = -1/3x + 5 never intersect


2. The graph of y = |x + 3|


3. The slope of a horizontal line is undefined


4. The coordinates of points in quaundrant III are always negativeTrue and False Math Questions?! Please Help?! 10 Points to best answer!?
1. False. The only way they would never intersect is if they had the same slope.





2. huh?





3. False. The slope of a vertical line is undefined. Horizontal lines are y=.





4. True. Quadrant III is the bottom left quadrant.

Business Law True and False?

In a C.O.D shipment, the buyer that pays for what turns out to be defective goods has made a binding acceptance of the goods.Business Law True and False?
COD means cash on delivery

Chemistry true and false questions?

1Reactions follow the law of conservation of mass.





2Reactants are the materials used in a chemical reaction.





3In a chemical equation, the material to the left of the arrow equals the material on the right.





4Diatomic molecules contain two atoms.





5Coefficients are the numbers written before a symbol or formula.





6(aq) stands for a solution involving any liquids.





7A synthesis reaction involves the combination of two or more substances to form a compound.





8In a single replacement reaction, sodium (Na) does not replace hydrogen.





9Metals can replace nonmetals.





10Combustion occurs when a substance combines with oxygen to produce light and heat.





11The kinetic-molecular theory states that all particles of matter are always in motion.





12Gases have molecules in rapid random motion.





13Gases can be considered fluids.





14Gases are not easily compressed.





15Gases spread to fill out space.





16Increased pressure on a gas at constant temperature will cause the volume to decrease.





17When a gas is under constant pressure and its temperature increases, its volume will increase.





18Pressure is force per unit of area.





19A newton is a unit of force.





20The barometer measures air pressure.





21Normal air pressure at sea level is read as 760 mm of mercury.





22STP is 100掳C and one atmosphere of pressure.





23The combined gas law involves all variables discussed in Boyle's, Charles's and Gay-Lussac's Law.





24Liquids are fluids.





25Liquids are easily compressed.





26Solids have definite shape and volume.





27Amorphous solids have crystal structures.





28Glass is amorphous.





29Change of state is a physical change.





30Boiling is rapid evaporation.





31Increasing the pressure of a liquid lowers its boiling point.





32Pure, crystalline solids freeze and melt at the same temperature.





33Sublimation is the change of a solid to a gas.





34Water expands as it freezes.





35Heat of vaporization turns a liquid to a gas.Chemistry true and false questions?
The above answer has quite a few wrong.





3. false. The mass will be the same, but the products and reactants (the material) will be different.


6. (aq) implies aqueous. Water only, not all liquids.


13. gases are fluids. (fluid is not the same as liquid)


17. Volume will increase at constant pressure


22. STP is not 100C.


27. Amorphous means no crystalline structure.


31. Increased pressure raises the BP.


32. TrueChemistry true and false questions?
Do you believe in magic? In a young girls heart?
woooooooow that is a lot of questions in one post why don't u narrow it a bit into few questions, anyways i will answer as much as i can but not sure of all of them ok.





3. True


4. True


5. True


6. True


9. False (they cannot)


13. False (never, gases are different from fluids)


14. False (They are easily compressed)


15. True


16. True


17. False (the opposite is right)


18. True


19. True


21. True


22. True


24. True


23. True


25. False (Opposite is right)


26. True


27. True


29. True


31. True


32. False (it depends)


34. True


35. True
  • hairstyles for long hair
  • True or false (and why) The subset S of R^2 consisting of all vectors of the form(a,1)form a subspae of R^2?

    False.


    For S to be a subspace it needs to satisfy a few requirements that it doesn't. Three examples:


    - We must have that if x and y are in S, then x+y is in S. But clearly (1,1) and (0,1) are in S, but their sum (1,2) is not in S.


    - Similarly, we need that for every t in R and x in S, t*x is in S. But (1,1) is in S and 2*(1,1)=(2,2) is not.


    - S does not contain the zero vector, which is another requirement for a subspace.

    Guys, I need all possible infos about CATS!!! Do's and dont's, true and false, etc.?

    I want to get a cat! Should I do it? I need negative views as well.Guys, I need all possible infos about CATS!!! Do's and dont's, true and false, etc.?
    I've had cats my whole life and work for a vet. PROS: GREAT companions, easy to take care of, a whole lot of fun to watch especially if you have more than 1. No expensive toys: will play with a balled up piece of tin foil or a shadow on the wall. No walking necessary! CONS: if you want a pet to mind you, don't get a cat. Cats will run around %26amp; knock over stuff, he will be curious to see what's in your glass %26amp; spill it. Cats, like dogs, need annual vet visits, shots, blood tests, good food and a safe environment. They need attention %26amp; companionship.


    Though I have always had both dogs %26amp; cats, I've always enjoyed cats more. I love the unpredictablity, the different personalities %26amp; the fabulous companionship. I'd love to be reincarnated as a pampered cat!Guys, I need all possible infos about CATS!!! Do's and dont's, true and false, etc.?
    Simply talk to your vet as you'll need one anyway. As for my opine.. YES get the cat and enjoy many years of happieness. LUCKTOYOU!!
    get it declawed and teach it to use the litter box
    It depends on your cat's personality. Some cats are able to be left alone for long periods of time, and others are glued to the window everytime you go outside! It's true they don't need to be walked, but many still have an urge to visit outside every now and then. If you live in an apartment, try to plan ahead of where you would keep the litterbox, bc it will smell. Also plan, to clean that once or twice a week, and plan for expenses of food, litter, toys, and vet bills. I also recommend picking your cat out from the humane society or wherever yourself, if you just pick a cute one out online, it may have a rotten personality.
    I have a cat. When he was a kitten, I did everything with him. EVERYTHING. He plays with me, plays catch, rides in car, I can even walk him on a leash. I don't worry about him and little kids, because I know he won't hurt them. They can't do anything to him that I didn't already do. I pulled on every hair he has. I poked him everywhere. I cut his nails. When he is bad (cuz he is still independent) I still whoop his butt. But like i said, I can leave him with a kid and he is fine. I can go out for the weekend, give him some food and water, FINE. Just make sure that you train them good, or you could have a hellian on your hands, your average bad cat that nobody likes. Scoop his litter everyday, and freshen it up every other day. Change it weekly. It's not that difficult. You could be outside scooping up land mines, or have a yard that smells like doggy poo..lol. Just train it, and everything will be fine. And don't do the water thing, my cat now loves the squirt gun.
    well i luv my cat but it meows nonstop i dunno y it started doing that but cats r great if it is an outside cat it will bring u nice presents n sometime eat their heads lol but i luv my cat hehehe


    have a great day
    Cats are not cute...
    i like cats


    cats make me smile
    A cat is a good choice as it is more independent and can care for itself and also makes a loving companion. a cat is usually a good choice but to start i would leave it as an indoor only cat so you know and at some point when it dies it sucks but you will probably want another, trust me a cat is a great choice and start with an older cat rather than a kitten they are less work and less people adopt older kitties and all kitties need a home nomatter how old they are. spray bottle for discipline for any reason, but never do any thing physical and hurt your cat. and i would say declaw the first and never let it out, but if you get a second dont bother and introduce it to the outside wolrd.
    OK first Zoe was ridiculous....





    The Cons....


    Cats can be very standoffish





    They get hairballs which are kind of nasty





    Lots of people are allergic to cats





    If you don't get them spayed/neuter they might pee and spray on your stuff which is very hard to remove the smell they also not as lovey if they not neuter/spayed





    if they arent declawed they might scratch your stuff up





    The pros....


    They are very independent





    Cats can be very loving if you pick it by it personality not by what it looks like





    My cat is a plain tabby cat but he was such a lover wanting to be cuddled and pet not just by me but anyone that comes into my house





    My cat is declawed but I made the mistake of seeing him after the surgery he had to stay overnight at the vet it was the sadist thing they had his legs all wrapped up and when he came home his white paws where a little pink from the blood I think it also tramutized him cause now he act like an insane cat when he goes there.But it does save my stuff and him from scratching me or others, he likes to rub his paws on my stuff like his scratching. If you do get it declawed dont use the scoopable litter I had a friend that declawed cat had to get major stomach surgery because the litter got stuck in the paws cause the stuff is like sand not like regular litter which has bigger grandular well the cat would clean it out of its paws and it clumped in its stomach and couldnt pass anything The paws are soft when they are declawed cause they remove the nail and the bone that is attached to the nail





    Cats can be trained... my cat doesnt go on are kitchen table or counters ....water bottle and yelling at him If you dont get it declawed you could probably train it by given it a squirt when he scratching your stuff





    Also cat only hate water if they arent around it I have friend that baths her cat weekly and the thing loves it get into the shower with her and everything but then I guess the water bottle thing wouldnt work
    NO!!!! DON'T DO IT!!!! just trust me
    Cat


    Conservation status: Domesticated








    other images of cats


    Scientific classification


    Kingdom: Animalia





    Phylum: Chordata





    Class: Mammalia





    Order: Carnivora





    Family: Felidae





    Genus: Felis





    Species: F. silvestris





    Subspecies: F.s. catus








    Trinomial name


    Felis silvestris catus


    (Linnaeus, 1758)








    The cat, also called the domestic cat or house cat, is a small feline carnivorous mammal of the subspecies Felis silvestris catus. Its most immediate pre-domestication ancestor is believed to be the African wild cat, Felis silvestris lybica. The cat has been living in close association with humans for between 8,000 and 3,500 years[1].





    There are dozens of breeds of cats, some hairless or tailless, and they exist in a variety of different colors. They are skilled predators and have been known to hunt over one thousand different species for food. They are also intelligent animals, and some can either be trained or learn by themselves to manipulate simple mechanisms such as lever-handled doors and flush toilets.





    They communicate by calling (';meow';/';miaou';), purring, hissing, growling, and body language. Cats in colonies use a mix of vocalizations and body language to communicate with each other.





    Because the domestication of the cat is relatively recent, cats may also still live effectively in the wild, often forming small colonies. The cat's association with humans leads it to figure prominently in the mythology and legends of several cultures, including those of the ancient Egyptians, ancient Chinese, and Norse.





    Contents [hide]


    1 Nomenclature


    2 Characteristics


    2.1 Physical features


    2.1.1 Ears


    2.1.2 Metabolism


    2.1.3 Legs


    2.2 Senses


    2.2.1 Sight


    2.2.2 Hearing


    2.2.3 Smell


    2.2.4 Touch


    2.2.5 Taste


    2.3 Communication


    2.3.1 Meow


    2.3.2 Purr


    2.3.3 Other Noises


    2.3.4 Body language


    2.4 Hunting and diet


    2.5 Hygiene


    2.5.1 Declawing


    2.6 Environment


    3 Reproduction and genetics


    4 Domestication


    4.1 Feral cats


    4.2 Environmental issues


    5 Scientific classification


    6 Varieties of domestic cat


    7 History and mythology


    8 References


    9 See also


    10 External links and references











    Nomenclature


    A group of cats is referred to as a clowder, while a male cat is called a tom, and a female is called a queen. An immature cat is called a kitten (which is also an alternate name for young rats, rabbits, hedgehogs, beavers, and squirrels). In medieval Britain, the word kitten was interchangeable with the word catling. A cat whose ancestry is formally registered is called a pedigree cat, purebred cat, or a show cat (although not all show cats are pedigree or purebred). In strict terms, a purebred cat is one whose ancestry contains only individuals of the same breed. A pedigree cat is one whose ancestry is recorded, but may have ancestors of different breeds (almost exclusively new breeds; cat registries are very strict about which breeds can be mated together). Cats of mixed ancestry are referred to as domestic longhairs and domestic shorthairs or commonly as random-bred, moggies, mongrels, mutt-cats or alley cats. The ratio of pedigree/purebred cats to random-bred cats varies from country to country. However, generally speaking, purebreds are less than ten percent of the total feline population (ASPCA Complete Guide to Cats by James R. Richards, DVM).








    Characteristics





    Physical features





    A cat grooming itselfCats typically weigh between 2.5 and 7 kg (5.5–16 pounds); however, some breeds, such as the Maine Coon can exceed 11.3 kg (25 pounds). Some have been known to reach up to 23 kg (50 pounds) due to overfeeding. This is very unhealthy for the cat, and should be prevented through diet and exercise (playing), especially for cats living exclusively indoors.





    In captivity, indoor cats typically live 14 to 20 years, though the oldest-known cat lived to age 36.[2] Domestic cats tend to live longer if they are not permitted to go outdoors (reducing the risk of injury from fights or accidents and exposure to diseases) and if they are spayed or neutered. Spaying and neutering a cat also decreases the risk of testicular and ovarian cancer, and female cats spayed before their first litter benefit from reduced risk of mammary cancer.[3] Feral cats living in modern urban environments often live only two years, or less. Feral cats in maintained colonies can live much longer; the British Cat Action Trust reported a 19-year-old feral female. The oldest feral cat was Mark who was maintained by the British charity Cats Protection and who reached 26 years of age.








    Ears


    Thirty-two individual muscles in the ear allow for a manner of directional hearing; [4] the cat can move each ear independently of the other. Because of this mobility, a cat can move its body in one direction and point its ears in another direction. Most cats have straight ears pointing upward. Unlike dogs, flap-eared breeds are extremely rare. (Scottish Folds are one such exceptional genetic mutation.) When angry or frightened, a cat will lay its ears back, to accompany the growling or hissing sounds it makes.








    Metabolism





    An orange tabby taking a ';cat nap';Cats conserve energy by sleeping more than most animals, especially as they grow older. Daily durations of sleep are various, usually 12–16 hours, with 13–14 being the average. Some cats can sleep as much as 20 hours in a 24-hour period. The term cat nap refers to the cat's ability to fall asleep (lightly) for a brief period and has entered the English lexicon – someone who nods off for a few minutes is said to be ';taking a cat nap';.





    Due to their nocturnal nature, cats are often known to enter a period of increased hyperactivity and playfulness during the evening, dubbed the 'evening crazies' or 'night crazies' by some. [5] [6]





    The temperament of a cat can vary depending on the breed and socialization. Shorter haired cats tend to be skinnier and more active, while cats with longer hair tend to be heavier and less active.





    The normal body temperature of a cat is between 38 and 39 °C (101 and 102.2 °F).[7] A cat is considered febrile if it has a temperature of 39.5 °C (103 °F) or greater, or hypothermic if less than 37.5 °C (100 °F). Comparatively, humans have a normal temperature of approximately 37 °C (97 to 100 °F). A domestic cat's normal heart rate ranges from 140 to 220 beats per minute, and is largely dependent on how excited the cat is. For a cat at rest, the average heart rate should be between 150 and 180 bpm.








    Legs


    A popular belief holds that cats always land on their feet; they do usually—but not always. During a fall, a cat can reflexively twist its body and right itself using its acute sense of balance and flexibility. [8]. This is known as the cat 'righting reflex'. It always rights itself in the same way, provided it has the time to do so during a fall. Certain breeds that don't have a tail are a notable exception, since a cat moves its tail and relies on conservation of angular momentum to set up for landing.





    Cats, like dogs, are digitigrades: they walk directly on their toes, the bones of their feet making up the lower part of the visible leg. Cats are capable of walking very precisely, because like all felines they directly register, that is, they place each hind paw (almost) directly in the print of the corresponding forepaw, minimising noise and visible tracks. This also provides sure footing for their hind paws when they navigate rough terrain.





    Like many predators, cats have retractable claws. This is actually a misnomer because in their normal, relaxed position the claws are sheathed with the skin and fur around the toe pads. This is done to keep the claws sharp by preventing wear from contact with the ground. It is only by stretching, such as swatting at prey, that the connecting tendons are pulled taut, forcing the claws to extend. Thus, extending the claws is an involuntary action.[citation needed]








    Senses





    A close-up of a cat's eyeMeasuring the senses of any animal can be difficult, because there is usually no explicit communication (e.g., reading aloud the letters of a Snellen chart) between the subject and the tester.





    While a cat's senses of smell and hearing may not be as keen as, say, those of a mouse, they are superior in many ways to those of humans. These along with the cat's highly advanced eyesight, taste, and touch receptors make the cat extremely sensitive among mammals.








    Sight


    Testing indicates that a cat's vision is superior at night in comparison to humans, and inferior in daylight. Cats, like dogs, have a tapetum lucidum that reflects extra light to the retina. While this enhances the ability to see in low light, it appears to reduce net visual acuity, thus detracting when light is abundant. In very bright light, the slit-like iris closes very narrowly over the eye, reducing the amount of light on the sensitive retina, and improving depth of field. The tapetum and other mechanisms give the cat a minimum light detection threshold up to seven times lower than that of humans. Variation in color of cats' eyes in flash photographs is largely due to the interaction of the flash with the tapetum.





    Average cats have a visual field of view estimated at 200°, versus 180° in humans, with a binocular field (overlap in the images from each eye) narrower than that of humans. As with most predators, their eyes face forward, affording depth perception at the expense of field of view. Field of view is largely dependent upon the placement of the eyes, but may also be related to the eye's construction. Instead of the fovea which gives humans sharp central vision, cats have a central band known as the visual streak. Cats can apparently differentiate among colors, especially at close range, but without appreciable subtlety.





    Cats have a third eyelid, the nictitating membrane, which is a thin cover that closes from the side and appears when the cat's eyelid opens. This membrane partially closes if the cat is sick; although in a sleepy, content cat this membrane is often visible. If a cat chronically shows the third eyelid, it should be taken to a veterinarian.








    Hearing


    Humans and cats have a similar range of hearing on the low end of the scale, but cats can hear much higher-pitched sounds, even better than dogs. Cats can hear 2 octaves higher than humans, and one-half octave higher than dogs. When listening for something, a cat's ears will swivel in that direction; a cat's ear flaps (pinnae) can independently point backwards as well as forwards and sideways to pinpoint the source of the sound. Cats can judge within three inches (7.5 cm) the location of a sound being made one yard (approximately one meter) away.








    A cat using its senses for exploration


    Smell


    A domestic cat's sense of smell is about fourteen times stronger than a human's. Cats have twice as many smell-sensitive cells in their noses as people do, which means they can smell things we are not even aware of. Cats also have a scent organ in the roof of their mouths called the vomeronasal, or Jacobson's, organ. When a cat wrinkles its muzzle, lowers its chin, and lets its tongue hang a bit, it is opening the passage to the vomeronasal. This is called gaping. Gaping is the equivalent of the Flehmen response in other animals, such as dogs, horses and big cats.








    Touch





    Whiskers clearly distinguishable on the wrist of even a long haired catCats generally have about a dozen whiskers in four rows on each upper lip, a few on each cheek, tufts over the eyes and bristles on the chin. Whiskers may also be found on the cat's inner ';wrists';, and there are similar hairs comprising the cat's eyebrows. The Sphynx (a nearly hairless breed) may have full length, short, or no whiskers at all.





    Whiskers (technically called vibrissae) can aid with navigation and sensation. Whiskers may detect very small shifts in air currents, enabling a cat to know it is near obstructions without actually seeing them. The upper two rows of whiskers can move independently from the lower two rows for even more precise measuring.





    It is thought that a cat may choose to rely on the whiskers in dim light where fully dilating the pupils would reduce its ability to focus on close objects. The whiskers also spread out roughly as wide as the cat's body making it able to judge if it can fit through an opening.





    Whiskers are also an indication of the cat's attitude. Whiskers point forward when the cat is inquisitive and friendly, and lie flat on the face when the cat is being defensive or aggressive.








    Taste


    According to National Geographic December 8, 2005 cats cannot taste sugary foods due to a faulty sweet receptor gene. Some scientists believe this is related to the cat's diet being naturally high in protein, though it is unclear whether it is the cause or the result of it.








    Communication





    Meow





    A cat vocalizingThe unique sound a cat makes is rendered onomatopoeically as ';meow'; or similar variants (';miaow';, ';miau'; etc.) in most European languages. Japanese has it as ';nyaa'; or ';nyan';, Korean as ';yaong'; or ';nyaong';. In Arabic the sound is transcribed as ';mowa'a';. Other variants exist throughout the world. The sound of an increasingly annoyed cat is transcribed in James Joyce's Ulysses as ';mkgnao';, ';mrkgnao'; and ';mrkrgnao'; [9].





    The cat's pronunciation of this call varies significantly depending on meaning. Usually cats call out to indicate pain, request human attention (to be fed or played with, for example), or as a greeting. Some cats are very vocal, and others rarely call out. Cats are capable of about 100 different vocalisations, compared to about 10 for dogs.





    A kitten's call first starts out as a high-pitched squeak-like sound when very young, and then deepens over time. Some cats, however, do not exercise their voices often, so their call may remain similar to that of a kitten through adulthood.








    Purr


    Main article: Purr


    Cats can also produce a purring noise that typically indicates that the cat is happy, but also can mean that it feels distress. Cats purr among other cats—for example, when a mother meets her kittens. Until recently, there were many competing theories to explain how cats purr, including vibration of the cat's false vocal chords when inhaling and exhaling, the sound of blood hitting the aorta, vibration of the hyoid apparatus, or resonation directly in the lungs. Currently, though, it is believed that purring is a result of rhythmic impulses to the cat's larynx.





    It is possible for a cat to call out and purr simultaneously, although this is typical only in very vocal cats. In addition to purring, happy cats may blink slowly or partially close their eyes to break any possible stares and communicate their ease in the situation.[10] However, purring may also be a way for the cat to calm itself down. For example, cats have been known to purr when hurt or dying.








    Other Noises


    Most cats growl or hiss when angered or in danger. Some may engage in nipping behavior or batting with their paws, either with claws extended or retracted. With cats who are improperly socialised and do not know their own strength, this can result in inadvertent damage to human skin. Like any injury, cat scratches can become infected, and in extreme cases can result in cat scratch fever.





    Cats are also known to make chirping or chattering noises when observing prey, or as a means of expressing interest in an object to nearby humans. When directed at out-of-reach prey, it is unknown whether this is a threatening sound, an expression of frustration, or an attempt to replicate a birdcall (or replicate the call of a bird's prey, for example a cicada). Recent animal behaviorists have come to believe this noise is a ';rehearsal behavior'; in which it anticipates or practices the killing of prey, because the sound usually accompanies a jaw movement similar to the one they use to kill their prey (the ';killing bite'; which saws through the victim's neck vertebrae).





    When passing solid waste, cats, like many types of predators, release from anal glands a small amount of liquid that scents their feces to mark their territory. These scent-producing anal sacs are found in all predators; those of the skunk are used for self-defense, for example. During moments of excitement or other strong emotions, a cat's anal sac may discharge, releasing a foul-smelling brown liquid. Anal irritation, possibly shown by the cat rubbing its bottom on the floor and frequent licking of the area, can be a sign that the cat's anal sacs are not being emptied when waste passes [11]. Although this condition can be treated through the addition of a small amount of bran to each meal, it may require veterinary attention. Shorthair cats are more prone to this problem.








    Body language


    Main article: Cat body language


    Cats will twitch the tips of their tails when hunting or angry, while larger twitching indicates displeasure. A tail held high is a sign of happiness, while half-raised shows less pleasure, and unhappiness is indicated with a tail held low. A scared or surprised cat may puff up its tail and the hair along its back and turn its body sideways to a threat in order to increase its apparent size. Tailless cats, such as the Manx, who possess only a small stub of a tail move the stub around as though they possessed a full tail, though it is not nearly as communicative as that of a fully tailed cat. Touching noses is a friendly greeting for cats, while a lowered head is a sign of submission.








    A mackerel tabby cat kneading a blanket before a nap. Note the forward position of the whiskers, indicating happiness.When cats are happy, they are known to paw their owners, or that on which they sit, with a kneading motion. Cats often use this action alongside purring to show contentment and affection for their owners. The action is often referred to as paddy-pawing, making muffins or treading paws. It is instinctive to cats, and they use it when they are young to stimulate the mother cat's nipple to release milk during nursing. As a result, cats that are hand-raised by humans may lack this reflex. Pawing is also a way for cats to mark their territory. The scent glands on the underside of their paws release small amounts of scent onto the person or object being pawed, marking it as ';theirs'; in the same way they would urinate to mark their territory.





    Hunting and diet


    Relative to size, domestic cats are very effective predators. They ambush and dispatch vertebrate prey using tactics similar to those of leopards and tigers by pouncing; they then deliver a lethal neck bite with their long canine teeth that severs the victim's spinal cord, or asphyxiate it by crushing the windpipe.





    The domestic cat can hunt and eat about one thousand species—many big cats will eat fewer than 100. Although, theoretically, big cats can kill most of these species as well, they often do not due to the relatively low nutritional content that smaller animals provide. An exception is the leopard, which commonly hunts rabbits and many other smaller animals.








    A cat yawning, showing characteristic canine teethCats have highly specialized teeth and a digestive tract suitable to the digestion of meat. The premolar and first molar together compose the carnassial pair on each side of the mouth, which efficiently functions to shear meat like a pair of scissors. While this is present in canines, it is highly developed in felines. The cat's tongue has sharp spines, or papillae, useful for retaining and ripping flesh from a carcass. These papillae are small backward-facing hooks that contain keratin and assist in their grooming. Unlike most carnivores, cats eat almost no vegetable matter apart from that found in the digestive tracts of their prey. However, some domesticated cats are known to like vegetables. Whereas bears and dogs commonly supplement their diet of meat with fruits, berries, roots, and honey when they can get them, cats feed exclusively on meat, usually freshly killed. Cats, including the great cats, have a genetic anomaly that prevents them from tasting sweetness [12], which is probably related to their meat-only habits.





    In captivity, cats cannot be adapted to an unsupplemented vegetarian diet because they cannot synthesize several nutrients they need and that are absent or rare in plant food. This applies mainly to taurine, vitamin A (cats cannot convert the pro-vitamin A that is abundant in plants to vitamin A proper) and to certain fatty acids. The absence of taurine causes the cat's retina to slowly degenerate, causing eye problems and (eventually) irreversible blindness. This condition is called central retinal degeneration (CRD). Cow's milk is a poor source of taurine and adult cats are generally lactose intolerant. Lactose-free milk is perfectly safe, but still not a substitute for meat. This contrasts with domesticated dogs, who commonly are fed a mixture of meat and vegetable products and can be adapted to non-supplemented vegetarian diets (though supplementation may be better for dogs too). However, the majority of brand-name cat foods are primarily grain based, often containing large amounts of corn or rice and supplemented with meats and minerals and vitamins.





    Some vegetarians feed their cats a vegetarian diet with supplements tailored to meet the specific needs of cats, such as the Vegecat supplement.





    Cats are also known to munch on grass, leaves, shrubs and houseplants. They do not eat a lot in one sitting, but prefer to have it as a snack. Eating vegetation in this way may aid the cat's digestive system and can prevent hairballs. [13].





    Some houseplants are harmful to cats. The leaves of the Easter Lily can cause permanent and life-threatening kidney damage to cats. Philodendron are also poisonous to cats. Cat Fancy has a full list of plants harmful to cats.





    About two thirds of cats have a fondness for catnip. While they generally don't consume it, they will often roll in it, paw at it, and occasionally chew on it. The effect is usually relatively short, lasting for only a few minutes. After two hours, susceptible cats gain interest again. Several other species of plants cause this effect, to a lesser degree.





    Cats can be fussy eaters. This mostly happens when the vomeronasal, or Jacobson's, organ becomes sensitized to a specific food, at which point the cat will reject any food that doesn't fit the pattern it is expecting. Additionally, cats have been known to develop a fondness for ';people food'; such as chicken, bread, French fries, pizza, ice cream, tomato soup, carrot juice, olives, and carnitas burritos, as well as cat diet exotica such as corn kernels and diced cantaloupe. Many ';people foods'; are not good for cats; chocolate, for example, can be fatal due to the presence of theobromine (see theobromine poisoning).





    Cats can also have what is called a Pica. Pica is where cats chew or eat unusual things such as plastic or wool. This behavior is mainly harmless as they do not digest most of it, and it tends to occur only in Siamese and Burmese cats.





    Domestic cats, especially young kittens, are known for their love of string play. Many cats cannot resist a dangling piece of string, or a piece of rope drawn randomly and enticingly across the floor. This notorious love of string is often depicted in cartoons and photographs, which show kittens or cats playing with balls of yarn. This propensity is probably related to their hunting instinct. If string is ingested, however, it can get caught in the cat’s stomach or intestines, causing illness, or in extreme cases, death. Due to the possible complications of injesting string, string play is sometimes replaced with a red dot laser pointer. Some people also discourage the use of laser pointers for play with pets, however, because of the fear of eye damage and/or the possible loss of satisfaction associated with the successful capture of an object or of prey.





    Because of their small size, domestic cats pose almost no danger to humans—the only hazard is the possibility of infection (or, rarely, rabies) from a cat bite or scratch.





    Cats can be destructive to ecosystems in which they are not native and whose species did not have time to adapt to their introduction. In some cases, cats have contributed to or caused extinctions—for example, see the case of the Stephens Island Wren.








    Hygiene





    Grooming tabby


    A cat litter box.Cats are known for their cleanliness. They groom themselves by licking their fur. Their saliva is a powerful cleaning agent, but it can provoke allergic reactions in humans. Some people who are allergic to cats—typically manifested by hay fever, asthma or a skin rash —quickly acclimate themselves to a particular animal and live comfortably in the same house with it, while retaining an allergy to cats in general. Many cats also enjoy grooming humans or other cats. Some cats occasionally regurgitate hair balls of fur that have collected in their stomachs as a result of their grooming. Longhair cats are more prone to this than shorthairs. Hairballs can be prevented with certain cat foods and remedies that ease elimination of the hair and regular grooming of the coat with a comb or stiff brush. Cats expend nearly as much fluid grooming as they do urinating.





    Indoor cats may be provided a litter box containing sand or similar commercial material (litter). This arrangement serves the same purpose as a toilet for humans. It should be cleaned daily and changed often (depending on the number of cats in a household and the type of litter—clumping litter stays cleaner longer, but has been reported to cause health problems in some cats. [14]) A litterbox is recommended for indoor-outdoor cats as well. Litterboxes may pose a risk of toxoplasmosis transmission to susceptible pregnant women and immuno-compromised individuals. Transmission risk may be reduced by daily litterbox cleaning.








    Toilet-trained catIn addition, some cats may be toilet trained, eliminating the litterbox and its attending expense and odor. Training involves two or three weeks of incremental moves, such as moving and elevating the litterbox until it is near the toilet. For a short time, an adapter, such as a bowl or small box, may be used to suspend the litter above the toilet bowl. When training is complete, the cat uses the toilet by perching over the bowl. [15]





    Indoor cats will also benefit from being provided with a scratching post so they are less likely to ruin furniture with their claws.[16] Nails can be trimmed, but care should be taken to avoid cutting a vein in the quick of the claw.








    Declawing


    Main article: Onychectomy


    Declawing is a major surgery known as onychectomy, performed under anesthesia, that removes the tip of each digit (from the first knuckle out) of the cat's forepaws. There is a slight chance of death in the surgery, and a declawed cat may have an increased risk of infection and life-long discomfort in its paws. This surgery is not recommended for an adult animal and is considered an act of animal cruelty in some countries (see below).





    People generally have cats declawed to prevent them from hunting and from damaging furniture. Rarely, vicious cats are declawed. In the United States, some landlords require that tenants' cats be declawed.





    Veterinarians are generally critical of the procedure and some refuse to perform it because the absence of claws in a cat:








    A cat brandishing its clawsDeprives it of its main defense abilities, including escaping from predators by climbing trees;


    Impairs its stretching and exercise habits, leading to muscle atrophy;


    Compromises its ability to balance on thin surfaces such as railings and fence tops, leading to injury from falls;


    Can cause insecurity and a subsequent tendency to bite.


    This operation is rare outside of North America. In Finland, Germany, the Netherlands and Switzerland, declawing is forbidden by the laws against cruelty to animals.[17] In many other European countries, it is forbidden under the terms of the European Convention for the Protection of Pet Animals, unless ';a veterinarian considers [such] non-curative procedures necessary either for veterinary medical reasons or for the benefit of (the) animal';. [18] In Britain, animal shelters find it difficult to place imported cats that have been declawed and subsequently most are euthanized. In 2003, West Hollywood, California became the first US jurisdiction to outlaw declawing by veterinarians or animal groomers practicing in city limits.





    An alternative to declawing is the application of blunt, vinyl nail caps that are affixed to the claws with nontoxic glue, requiring periodic replacement when the cat sheds its claw sheaths (about every four to six weeks). However, the cat will still experience difficulties because the capped nails are not as effective as claws.





    After a cat has been declawed, it should be allowed to rest, and restrained from jumping (if possible) for a few days. After being neutered/spayed/declawed (as with after any surgery), the cat will go through a period when being played with or picking it up may hurt it. This usually lasts a week or less. While some people suggest that cats should not be declawed until 5-6 months of age, many veterinarians who practice this surgery are of the opinion the cat can be declawed as soon as it is old enough to sustain surgery (around 2-3 months of age, depending on size). The reasoning behind it is that younger cats are more adaptable to the amputation, and the fact that distal phalanges in the cat at this age are still cartilaginous may make the operation somewhat less painful.








    Environment


    The wild cat, ancestor of the domestic cat, is believed to have evolved in a desert climate, as evident in the behavior common to both the domestic and wild forms. Wild cats are native to all continents other than Australasia and Antarctica. Their feces are usually dry, and cats prefer to bury them in sandy places. They are able to remain motionless for long periods, especially when observing prey and preparing to pounce. In North Africa there are still small wildcats that are probably related closely to the ancestors of today's domesticated breeds.





    Cats enjoy heat and solar exposure, often sleeping in a sunny area during the heat of the day. Cats prefer warmer temperatures than humans do. People start to feel uncomfortable when their skin's temperature gets higher than about 44.5 °C (112 °F), but cats don't start to show signs of discomfort until their skin reaches about 52 °C (126 °F).





    Being closely related to desert animals, cats can easily withstand the heat and cold of a temperate climate, but not for long periods. Although certain breeds such as the Norwegian Forest Cat and Maine Coon have developed heavier coats of fur than other cats, they have little resistance against fog, rain and snow and struggle to maintain their 39 °C (102 °F) body temperature when wet. Most cats dislike immersion in water; one major exception is the Turkish Van breed which has an unusual fondness for water. If a cat is continually exposed to water from a very young age, often it will develop a fondness for it; however, this rarely if ever occurs naturally.








    Reproduction and genetics





    Four kittens being nursedCats are seasonally polyestrous, which means they may have many periods of heat over the course of a year. A heat period lasts about 4 to 7 days if the female is bred; if she is not, the heat period lasts longer.





    The male cat's penis has spines which point backwards. Upon withdrawal of the penis, the spines rake the walls of the female's vagina. The female needs this stimulation for ovulation to begin. Because this does not always occur, females are rarely impregnated by the first male with which they mate. Furthermore, cats are superfecund; that is, a female may mate with more than one male when she is in heat, meaning different kittens in a litter may have different fathers.





    The reproduction process can be very loud, as both cats vocalize loudly. If one is not used to the sounds of cats mating, it sounds very much like a cat fight.





    The gestation period for cats is approximately 60 days. The size of a litter averages three to five kittens, with the first litter usually smaller than subsequent litters. Kittens are weaned at between six and seven weeks, and cats normally reach sexual maturity at 4-10 months (females) and to 5-7 months (males).





    Cats are ready to go to new homes at about 7 weeks old, or when they are ready to leave their mother. Cats can be surgically sterilized (spayed or neutered) as early as 3 months to limit unwanted reproduction. This surgery also prevents undesirable sex-related behavior, such as territory marking (spraying urine) in males and yowling (calling) in females. If an animal is neutered after such behavior has been learned, however, it may persist.








    Blue-eyed cats with white fur have a higher incidence of genetic deafness. Over 200 heritable genetic defects have been identified in the cat, many of which are homologous to human inborn errors. Specific metabolic defects have been identified underlying many of these feline diseases.There are several genes responsible for the hair color identified. The combination of them gives different phenotypes. See Cat coat genetics.





    Features like hair length, lack of tail or presence of a very short tail (bobtail cat) are also determined by single alleles and modified by polygenes.





    A Cat Genome Project is sponsored by the Laboratory of Genomic Diversity at the U.S. National Cancer Institute Frederick Cancer Research and Development Center in Frederick, Maryland. The research focuses on development of the cat as an animal model for human hereditary disease, infectious disease, genome evolution, comparative research initiatives within the family Felidae, and forensic potential.








    Domestication


    Like some other domesticated animals, cats live in a mutualistic arrangement with humans. Cats, however, have done so for a shorter time than many other domesticated animals, and the degree of domestication of cats is disputed by some, especially compared to the dog. Since the benefit of removing rats and mice from humans' food stores outweighed the cost of allowing a formerly wild animal to enjoy the relative safety of a human settlement, the relationship between cat and human flourished. Unlike the dog, which also kills rodents, the cat did not eat grains, fruits, or vegetables. A cat that is good at hunting rodents is referred to as a mouser.





    The venerable simile ';like herding cats'; refers to the seeming intractability of the ordinary house cat to be trained in the manner of the dog. Despite occasional cohabitation in colonies, cats are lone hunters. It is no coincidence that cats are also ';clean'; animals, the chemistry of their saliva, expended in frequent grooming, acting as a natural deodorant. The ';purpose'; of this cleanliness is to help hide the cat's presence while stalking prey. A dog's odor, on the other hand, is an advantage, for a dog is a pack hunter; part of the pack stations itself upwind, and its odor drives prey towards the rest of the pack stationed downwind. This requires a cooperative effort, which in turn requires communications skills. No such communications skills are required of the lone hunter. Thus, communicating with such an animal is problematic, and cats in particular are labelled as opaque or inscrutable, if not obtuse, as well as aloof and self-sufficient. However, cats can be very affectionate towards their humans, especially if they imprint on them at a very young age and are treated with consistent affection.








    A cat carrying a caught pigeonHuman attitudes toward cats vary widely. Some humans keep cats for companionship as pets. Some people (known as cat lovers) go to great lengths to pamper their cats, sometimes treating them almost as if they were children. When a cat bonds with its human owner, at times, the cat may display behaviors similar to that of the human. Such behavior may include a trip to the litter box before bedtime and snuggling up close to its companion in bed or on the sofa. Other behaviors could include mimicking sounds of the owner or using certain sounds the cat picks up from the human; sounds representing specific needs of the cat, which the owner would recognize. The cat may also be capable of learning to communicate with the human using non-spoken language or body language such as rubbing for affection (confirmation), facial expressions and making eye contact with the owner if something needs to be addressed (e.g. finding a bug crawling on the floor for the owner to get rid of). Some owners like to train their cat to perform ';tricks'; commonly exhibited by dogs such as jumping.





    Allergies to cat dander are one of the most common reasons people cite for disliking cats. However, in some instances, humans find the rewards of cat companionship outweigh the discomfort and problems associated with allergies. Many choose to cope with cat allergies by taking prescription allergy medicine and bathing their cats frequently, since weekly bathing will eliminate about 90% of the cat dander present in the environment. Recent studies have indicated that humans who are exposed to cats or dogs within the first year of their lives develop few animal allergies, while most adults who are allergic to animals did not have a cat or a dog as a pet in childhood.





    In urban areas, some people find feral and free-roaming pet cats annoying and intrusive. Unaltered animals can engage in persistent nighttime calling (caterwauling) and defecation or ';marking'; on private property. Indoor confinement of pets and TNR (trap, neuter, return) programs for feral cats can help in this situation; some people also use cat deterrents to discourage cats from entering their property.





    In rural areas, farms often have dozens of semi-feral cats. Hunting in the barns and the fields, they kill and eat rodents that would otherwise spoil large parts of the grain crop. Many pet cats successfully hunt and kill rabbits, rodents, birds, lizards, frogs, fish, and large insects by instinct, but might not eat their prey. They may even present such victims, dead or maimed, to a beloved owner, perhaps expecting their owner to praise or reward them, or possibly even complete the kill and eat the mouse.





    Despite its reputation as a solitary animal, the domestic cat is social enough to form colonies, but does not attack in groups as do lions. Some breeds like bengal, ocicat and manx are very social, but these breeds are exceptions. While each cat holds a distinct territory (sexually active males having the largest territories, and neutered cats having the smallest), there are ';neutral'; areas where cats watch and greet one another without territorial conflict or aggression. Outside of these neutral areas, territory holders usually vigorously chase away strangers, at first by staring, hissing, and growling, and if that does not work, by short but noisy and violent attacks. Fighting cats make themselves look larger by raising their fur and arching their backs. Attacks usually comprise powerful slaps to the face and body with the forepaws as well as bites, but serious damage is rarely done, and usually the loser runs away with little more than a few scratches to the face. Normally the serious negative effects of a cat fight would be possible infections of the scratches and bites, which have been known to kill cats themselves. Sexually active males may be engaged in many fights over their lives and often have decidedly weathered faces with obvious scars and cuts to the ears and nose. Not only males will fight; females will also fight over territory or to defend their kittens, and even neutered cats will defend their small territories vigorously.








    Feral cats





    Feral cats are thought to be a major predator of Hawaiian coastal and forest habitats, and are one species among many responsible for the decline of endemic forest bird species as well as seabirds like the Wedge-tailed Shearwater. [1] In one study of 56 cat scats, the remains of 44 birds were found, 40 of which were endemic species. [2]Feral cats may live alone, but most are found in large groups called feral colonies with communal nurseries, depending on resource availability. Many lost or abandoned pet cats join these colonies out of desperation. The average lifespan of these feral cats is much shorter than a domestic housecat, which can live an average of sixteen years or more. Urban areas are not native environments to the cat; most domestic cats were artificially selected from cats in desert climates and were distributed throughout the world by humans, but some feral cat colonies are found in large cities, for example, around the Colosseum and Forum Romanum in Rome. Although cats are adaptable, feral felines are unable to thrive in extreme cold and heat, and with a very high protein requirement, few find adequate nutrition on their own in cities. In addition, they have little defense or understanding of the dangers from dogs, coyotes, and even automobiles. However, there are thousands of volunteers and organizations that trap these unadoptable feral felines, spay or neuter them, immunize the cats against rabies and feline leukemia, and treat them with long-lasting flea products. Before release back into their feral colonies, the attending veterinarian often nips the tip off one ear to mark the feral as spayed/neutered and inoculated, as these cats will more than likely find themselves trapped again. Volunteers continue to feed and give care to these cats throughout their lives, and not only is their lifespan greatly increased, but behavior and nuisance problems, due to competition for food, are also greatly reduced. In time, if an entire colony is successfully spayed and neutered, no additional kittens are born and the feral colony disappears. Many hope to see an end to urban feral cat colonies through these efforts.





    See also: Feral cat colony





    Environmental issues


    There are two divergent views about cats’ relationship with the natural environment.





    The first says: The environmental impact of feral cat programs and of indoor/outdoor cats is a subject of debate. Part of this stems from humane concern for the cats themselves and part arises from concerns about cat predation on endangered species. Nearly all studies agree that abandoned animals lead hard lives. Owners who can no longer keep their cats would do best to give them to friends, rescue organizations, or shelters. The amount of ecological damage done by indoor/outdoor cats depends on local conditions. The most severe impact occurs with island ecologies. Serious concerns also exist in places such as Florida where housecats are not native, where several small-sized endangered species live near human populations, and where the climate allows cats to breed throughout the year. Environmental concerns may be minimal in most of England where cats are an established species and few to none of the local prey species are endangered. Pet owners can contact veterinarians, ecological organizations, and universities for opinions about whether local conditions are suitable for outdoor cats. Additional concerns include potential dangers from larger predators and infectious diseases. Coyotes kill large numbers of housecats in the Southwestern United States, even in urban zones. FELV (feline leukemia), FIV (feline immunodeficiency virus), or rabies may be present in the area. If faced with conflicting evidence, the safe choice is to keep a cat indoors. Experts recommend a gradual transition to indoor life for cats who are accustomed to going outside.


    Those opposing this view emphasize that this allegation has never been proved. They say that damaging effects do not follow automatically from the fact that cats are predators. They point out that cats have played a useful role in vermin control for centuries, and that for many animals, especially in urban areas, cats are the only animal available to fill the vital role of predator. Without cats these species would overpopulate.





    Scientific classification


    The domestic cat was named Felis catus by Carolus Linnaeus in his Systema Naturae of 1758. Johann Christian Daniel von Schreber named the wild cat Felis silvestris in 1775. The domestic cat is now considered a subspecies of the wild cat: by the strict rule of priority of the International Code of Zoological Nomenclature the name for the species thus ought to be F. catus since Linnaeus published first. However, in practice almost all biologists use F. silvestris for the wild species, using F. catus only for the domesticated form.





    In opinion 2027 (published in Volume 60, Part 1 of the Bulletin of Zoological Nomenclature, 31 March 2003 [19]) the International Commission on Zoological Nomenclature ';conserved the usage of 17 specific names based on wild species, which are predated by or contemporary with those based on domestic forms';, thus confirming F. silvestris for the wild cat and F. silvestris catus for its domesticated subspecies. (F. catus is still valid if the domestic form is considered a separate species.)





    Johann Christian Polycarp Erxleben named the domestic cat Felis domesticus in his Anfangsgründe der Naturlehre and Systema regni animalis of 1777. This name, and its variants Felis catus domesticus and Felis silvestris domesticus, are often seen, but they are not valid scientific names under the rules of the International Code of Zoological Nomenclature.








    Varieties of domestic cat





    This Greek cat has light fur and green eyes.The list of cat breeds is quite large: most cat registries recognize between 35 and 70 breeds of cats, and several more are in development, with one or more of new breeds being recognized each year on average. Each breed has distinct features and heritage. The owners and breeders of show cats compete to see whose animal bears the closest resemblance to the ';ideal'; definition of the breed (see selective breeding). Due to common crossbreeding in populated areas, many cats are simply identified as belonging to the homogeneous breeds of domestic longhair and domestic shorthair, depending on their type of fur. In the United Kingdom and Australia, non-purebred cats are referred in slang as moggies (derived from ';Maggie';, short for Margaret, reputed to have been a common name for both housemaids and housecats back in the Victorian era). In the United States, a non-purebred cat is sometimes referred to in slang as an alley cat, even if it is not a stray.





    Cats come in a variety of colors and patterns. These are physical properties and should not be confused with a breed of cat.





    Household cats are divided into:





    Domestic longhaired


    Domestic shorthaired





    A classic example of a mackerel tabby.Cat coat genetics can produce a variety of coat patterns; some of the most common are


    Bicolor cat


    This pattern varies between the tuxedo cat which is mostly black with a white chest, and possibly markings on the face and paws/legs, all the way to the Van pattern, where the only colored parts of the cat are the base of the tail and tail, and the top of the head. There are several other terms for amounts of white between these two extremes, such as harlequin or jellicle cat. Bicolor cats can have as their primary (non-white) color black, red, any dilution thereof and also tortoiseshell (see below for definition).


    Maltese cat


    The former name for a blue (grey) cat.


    Tabby cat


    Striped, with a variety of patterns. The classic ';blotched'; tabby (or ';marbled';) pattern is the most common and consists of butterflies and bull's-eyes. The ';mackerel'; or ';striped'; tabby is a series of vertical stripes down the cat's side (resembling the fish). This pattern broken into spots is referred to as a ';spotted'; tabby. Finally, the tabby markings may look like a series of ticks on the fur, thus the ';ticked'; tabby, which is almost exclusively associated with the Abyssinian breed of cats. The worldwide evolution of the cat means that certain types of tabby are associated with certain countries; for instance, blotched tabbies are quite rare outside NW Europe, where they are the most common type.





    This tortoiseshell cat has black-brown-white fur and green eyes.Tortoiseshell and Calico


    This cat is also known as a Calimanco cat or Clouded Tiger cat, and by the nickname ';tortie';. In the cat fancy, a tortoiseshell cat is randomly patched over with red (or a dilute form thereof), black (or a dilute) and cream, mottled throughout the coat. Additionnally, the cat may have white spots in its fur, which will make it a ';tortoiseshell and white'; cat or, if there is a significant amount of white in the fur and the red and black colors form a patchwork rather than a mottled aspect, the cat will be called a ';Calico';. All calicos are tortoiseshell (as they carry both black and red), but not all tortoiseshells are calicos (which requires a significant amount of white in the fur and patching rather than mottling of the colours). The calico is also sometimes called a ';tricolor cat';. The Japanese refer to this pattern as mi-ke (meaning ';triple fur';). A true tricolor must consist of three kinds of color: a reddish color, dark or light; white; and one other color, typically a brown, black or blue, as described by American breeder Barbara French, writing for the Cat Fanciers community [20]. Both tortoiseshell and calico cats are typically female because the coat pattern is the result of differential X chromosome inactivation in females (which, as with all normal female mammals, have two X chromosomes). Those male tortoiseshells that are created are usually sterile; conversely, cats where the overall color is ginger (orange) are commonly male (roughly in a 3:1 ratio). In a litter sired by a ginger tom, the females will be tortoiseshell or ginger. See ';Tortoiseshell and Tricolour Cats'; for an extensive genetic explanation for tricolor cats, and detailing the possible combinations of coloring.[21]





    A Bicolor cat.Cats can also come in several body types, ranging between two extremes:





    Oriental


    not a specific breed, but any cat with an elongated slender build, almond-shaped eyes, long nose, large ears (the siamese and oriental shorthair breeds are examples of this).


    Cobby


    any cat with a short, muscular and compact build, roundish eyes, short nose small ears (the persian breed is a prime example of a cobby cat).





    History and mythology


    Main article: History of cats


    Cats have been kept by humans since at least ancient Egypt. In ancient Egypt, the cat god, Bast, was a goddess of the home and of the domestic cat, although she sometimes took on the war-like aspect of a lioness. She was the daughter of the sun god Ra, although she was sometimes regarded as the daughter of Amun. She was the wife of Ptah and mother of the lion-god Mihos. Her cult was centered on her sanctuary at Bubastis in the Nile Delta, where a necropolis has been found containing mummified cats. Bast was also associated with the ';eye of Ra,'; acting as the instrument of the sun god's vengeance. She was depicted as a cat or in human form with the head of a cat, often holding the sacred rattle known as the sistrum. Interestingly, the symbol used to represent a cat in hieroglyphs, and the word used for ';cat'; in everyday Egyptian parlance, was pronounced as ';miaow';.





    It has been speculated that because of circumstantial evidence (to date unproved by DNA testing) cats resident on Kenya's Islands in the Lamu Archipelago may be the last living direct descendants of the sacred cats of ancient Egypt. The suggestive evidence is: similar body conformation, archeologically proven history of 1000 years habitation, ancient Red Sea trade between Lamu and Egypt, genetic insular isolation. [citation needed]





    According to Norse legend, the fine ribbon used to bind Fenrir was crafted by dwarfs from, among other items, the sound a cat makes when walking.





    Several ancient religions believe that cats are exalted souls, companions or guides for humans, that they are all-knowing but are mute so they cannot influence decisions made by humans.





    It is common lore that cats have nine lives. It is a tribute to their perceived durability, their occasional apparent lack of instinct for self-preservation, and their seeming ability to survive falls that would be fatal to other creatures.








    References


    %26lt;Couffer, Jack, ';The Cats of Lamu'; Lyons Press, New York, 1998. ISBN 1-55821-675-8





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    ^ Suspected bentonite toxicosis in a cat from ingestion of clay cat litter. URL accessed on September 10, 2005.


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    See also


    Creme Puff


    Wikibooks has more about this subject:


    How to choose your pet and take care of itLook up cat in Wiktionary, the free dictionary.Look up kitty in Wiktionary, the free dictionary.Look up meow in Wiktionary, the free dictionary.Felidae


    Big cat


    Cat body language


    Catnip


    Cat flap


    Cat Fanciers' Association


    Cats in ancient Egypt


    Catfight


    Catfight (animal behavior)


    Kitten


    List of historical cats


    List of fictional cats


    Polydactyl cat (extra toes)


    Cat types


    Cat breeds





    External links and references


    Wikispecies has information related to:


    CatWikiquote has a collection of quotations related to:


    CatWikimedia Commons has media related to:


    Category:Felis silvestris catusMedical issues


    Feline Medical %26amp; Behaviour Database (large number of short articles)


    ';DNA Offers New Insight Concerning Cat Evolution';, The New York Times, January 6, 2006.


    High-Resolution Images of the Cat Brain


    Onions are Toxic to Cats


    Feral cats


    Australian Threat Abatement Plan for Predation by Feral Cats


    Feral cats (University of Florida)


    Feral cats (BBC)


    Animals Australia: Feral Cat bibliography


    American Veterinary Medical Association (large article on cat colonies)


    Feral cats (The Wildlife Society)


    Vegetarian cats


    Vegpets.com Information site for vegetarian cats and other pets


    Harbingers of a New Age Makers of the Vegecat supplement


    AMÌ Makers of vegetarian kibble for cats (for Europe)


    Miscellaneous


    American Bird Conservancy (domestic cat predation)


    New Potential Smallest Cat


    BBC.CO.UK Description of the Cat


    Cationary: Meaningful Portraits of Cats by Sharon Montrose, ISBN 0-670-03059-7





    Retrieved from ';http://en.wikipedia.org/wiki/Cat';


    Categories: Semi-protected | Domesticated animals | Articles with unsourced statements | Animals kept as pets | Cats





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    This page was last modified 05:38, 12 May 2006. All text is available under the terms of the GNU Free Documentation License (see Copyrights for details).


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    Privacy policy About Wikipedia Disclaimers
    if you get one, i have 2 words for you.





    Squirt bottle.





    Cats hate water and you can use it to discipline them without hurting them. Almost all indoor cats will try clawing the furniture, jumping on counter tops and other nuisance behavior. Whenever you see them start to claw somewhere they shouldn't, all you have to do is reach for the bottle. After they know what it does, they will react to you reaching for the bottle and you won't have to spray them.
    I have 4 cats now and had several in the past. All cats are differant so it's hard to be that general. If you are adopting, go for an older kitten with an established personality. You will see by then if the animal is shy, timid or very loving.





    The worst part about cat ownership is cleaning out the litterbox. It should be done daily. Feed a good quality indoor cat food and provide fresh water at all times. Do research on poisonous house plants and avoid them because cats like to chew on plants.





    Do not declaw, it's cruel and sadistic. Provide toys for your cat and a place for a scratching post. My cats never scratched on the furniture but many do.
    If you are wanting an animal that is selfish, a pain in the butt, and will show no affection to you what-so-ever, than go ahead and get a cat.





    Otherwise, go with a dog. They are so much better than cats.
    Cats rule. They are affectionate, but also independant. (If for some reason you accidentaly forget about it, god forbid, it will live on it's own.) They mostly exercise themselves, can live indoors or outdoors, and only need to eat once a day! Also there is nothing better than a warm furry ball curled up by your side purring.





    Do: go to a local animal shelter or pound, not a pet shop.


    Do: get a clumping litter, and a litterbox for each cat. (2 cats, 2 boxes.)


    Do: Feed wet canned food once a day, either in the morning, noon, or at night, and a snack of dry food. (If you feed it in the morning, give dry food at night, or vise-versa.)


    Do: Concidor how much grooming time you have. Long-haired cats are more demanding, and shed a lot more.


    Do: Love your cat, and it will love you. Buy a catnip toy or 2, get a scratching post, pet it whenever you see him/her, feed it, and nothing will compare to the devotion you see in its eyes.





    Don't: Pick it up as soon as you bring it home. Let it get used to you. First let it out in a small room, get used to that, and then the rest of the house/appartment. Let it sniff your finger, then pet it, and eventually after a week or so pick it up.


    Don't: Have an inside/outside cat. If you live in an apartment, it's obviously and inside cat. If you have your own yard and stuff, you should choose: Always inside, or always out. If the cat sleeps inside but is out during the day, it will bring in fleas, ticks, etc. Inside cats generally live longer, healthier lives.


    Don't: Step on a cat's tail. They hate it.


    Don't: Hit it. If it is bad or misbehaves, scold with your voice and send out of the room. DO NOT HURT YOUR CAT. If really bad, put in crate/cat carrier directly after scolding, say bad cat! and elave in form 1-5 minutes. (any longer and they forget why they're there.)





    True: Cats need to sharpen their claws, and they will do it on your furniture if you let them. Don't let them. Purchase a scratching post and demonstrate scratching. (YES, on all fours.) Rub in some catnip. If this doesn't work, get some 'SoftClaws', available at most pet stores, which are little cpas that fit over the claws and come in cool colors. If THIS doesn't work, declaw or live with it.


    False: Cats can see in the dark; they don't need any light and you don't need to provide any at night. Wrong! Cats can see very well in the partial-dark, much better than humans, but if you cna't see anything, neighter can your cat. If you plan on letting your cat roam the house at night, (we put ours in the basement with water and litter) leave a night-light or 2 on.


    Usually true: cats always land on their feet. Much more than other animals, but not always. Also, if they jump from too high, even if they do land on their feet, their paws can get hurt and they can break bones.





    True: CAts will learn their name. It takes a while, but it will happen. HOWEVER, knowing their name doesn't neccesarrily mean they will come when you call. :)





    I hope you get a cat and enjoy it as much as I enjoy mine!
    Ok Zoeboxcat that answer was a little out of control. Anyway, cats are nice pets. Keep it an inside cat. That will reduce flea's, injury and disease. Realize though, that some cats like to get into things, like knocking over the kitchen garbage cans. I have a cat who just loves getting a hold of the toilet paper and ripping it apart. But all of these things can be prevented with a few adjustments and hey sometimes it's even funny! But at the end of the day when they jump on your lap and cuddle it's nice to have them around!


    Make sure to buy some toys, they like to play. You will have to plan on cleaning the litter box routinely.
    I have a cat SHE';S very cool get one
    Seems like you have a lot of info already but I would say squirt bottle, get them fixed other wise litter trained or not cat pee everywhere.

    How many of each are there between true, false and floating ribs?

    12