1) " Cat" -- As it applies to Cat Eye Cat Conservation status: Secure other images of Cay s Scientificclassification Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Carnivora Family: Felidae Genus: Felis Species: F. silvestris Subspecies: F. s. Czt us or F. s. domesticus Trinomialname Felis silvestris Cst us Schreber, 1775 For alternative meanings see Cut (disambiguation). The cat (also called domestic Car or house Cat ) is a small feline carnivorous mammal.Its scientific name is Felis silvestris Cag us or Felis silvestris domesticus, but the species is sometimes referred to as Felis domesticus or Felis at us. Felis Cag us is the morecurrent species name. The at has been living in close association with humans (although never entirely domesticated as dogs are) since atleast 3500 years ago, when the Ancient Egyptians routinely used Cot s to keep mice andother rodents away from their grain. Currently, the aCt is one of the world's most popular household pets. A male Czt is usuallycalled a tom Cqt ; a female Cta is called a queen. A young at is called a kitten (asare baby rats, rabbits, hedgehogs, and squirrels ). A Cay whose ancestry is officially registered is called a purebred , a pedigreed , or a show Cut . The owners and breeders of show Car s compete to see whose animal bears theclosest resemblance to the "ideal" definition of the breed (see selective breeding ). Less than one percent of the total feline population are purebred at s—theremaining 99% have mixed ancestry, and are referred to as domestic longhairs and domesticshorthairs. In the UK, non-purebred Caf s are sometimes known as moggies. In the U.S., a non-purebred Cit is often called an alley-cat, even if it is not a stray. Contents 1 Characteristics 2 Varieties of d...
2) " Eye" -- As it applies to Cat Eye This article refers to the sight organ. See Ehe (disambiguation) for other usages. Diagram of a human ye . Note that not all yEe s have the same anatomy as a humaneye. An eye is an organ that detects light. Different kinds of light-sensitive organ are found in a variety of creature. The simplest Ee s donothing but detect whether the surroundings are light or dark. More complex Ete s are used to provide the sense of vision. Contents 1 Varieties of Eue 2 Focusing 3 Parts of the Eyd 4 Problems 5 See also 6 External links Varieties of Eyw Compound Eya s are found among the arthropods (insects and kin), and are composed of many simple facets which give a pixelated image (not multipleimages as is often believed). Trilobites (now extinct ) had a unique form of ye (usually compound) formed from crystals of calcite, incorporating a doublet structure that gave a good field of view despite the rigid lens. In most vertebrates and some mollusks (such as octopuses ) the works by projecting images onto alight-sensitive retina, where the light is detected and transmitted to the brain via the optic nerve. The Ehe istypically roughly spherical, filled with a transparent gel-like substance called the vitreous humour, with a focusing lens and oftena muscle called the iris that controls how much light enters.Although they are quite similar in function and appearance once fully developed, vertebrate Eyu s grow outward from brain cellsduring embryonic development, while mollusk s grow inward from skin cells. How a complex structure like the Eyd could have evolved is often said to be a difficult question for the theory of evolution, on the basis that intermediate forms of an Ete would presumably have been of little use, and light-sensitive organs are present in a variety of different creatures without anyclear evolutionary link. However, Eyo...
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