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Basic Ophthalmology Richard Harper Pdf To Word

 

Domesticated Kingdom: Phylum: Class: Order: Suborder: Family: Genus: Species: Subspecies: F. s. Catus Felis silvestris catus, Felis catus (original combination) Felis catus domestica (invalid ) The domestic cat ( Felis silvestris catus or Felis catus) is a small, typically,. They are often called house cats when kept as indoor or simply cats when there is no need to distinguish them from other and. Cats are often valued by humans for companionship and for their ability to hunt. There are more than 70 cat, though different associations proclaim different numbers according to their standards. Cats are similar in to the other felids, with a strong flexible body, quick reflexes, sharp retractable claws, and teeth adapted to killing small prey. Cats can hear sounds too faint or too high in for human ears, such as those made by mice and other small animals.

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Basic Ophthalmology Richard Harper Pdf To WordBasic Ophthalmology Richard Harper Pdf To Word

They can see in near darkness. Like most other mammals, cats have poorer and a better than humans. Cats, despite being solitary hunters, are a and includes the use of a variety of (,,, hissing,, and ), as well as and types of. Cats have a high breeding rate. Under controlled breeding, they can be bred and shown as pedigree pets, a hobby known as.

Failure to control the breeding of pet cats by, as well as the, has resulted in large numbers of worldwide, requiring. In certain areas outside cats' native range, this has contributed, along with habitat destruction and other factors, to the extinction of many bird species. Cats have been known to extirpate a bird species within specific regions and may have contributed to the extinction of isolated island populations. Cats are thought to be primarily responsible for the extinction of 33 species of birds, and the presence of feral and free-ranging cats makes some otherwise suitable locations unsuitable for attempted. Since cats were, they were commonly believed to have been domesticated there, but there may have been instances of domestication as early as the from around 9,500 years ago (7,500 BC). A genetic study in 2007 concluded that all domestic cats are descended from, having diverged around 8,000 BC in the.

A 2016 study found that were undergoing domestication independently in China around 5,500 BC, though this line of partially domesticated cats leaves no trace in the domesticated populations of today. A 2017 study confirmed that domestic cats are descendants of those first domesticated by farmers in the Near East around 9,000 years ago. As of a 2007 study, cats are the second most popular pet in the US by number of pets owned, behind. In a 2010 study they were ranked the third most popular pet in the UK, after fish and dogs, with around 8 million being owned. Main article: The domestic cat is believed to have evolved from the, whose range covers vast portions of the Middle East westward to the Atlantic coast of Africa. Between 70,000 and 100,000 years ago the animal gave rise to the genetic lineage that eventually produced all domesticated cats, having diverged from the Near Eastern wildcat around 8,000 BC in the. The felids are a rapidly evolving family of mammals that share a common ancestor only 10–15 million years ago and include,, and many others.

Within this family, domestic cats ( Felis catus) are part of the, which is a group of small cats containing about seven species (depending upon classification scheme). Members of the genus are found worldwide and include the ( Felis chaus) of southeast Asia, ( F. Silvestris silvestris), ( F. Lybica), the ( F. Driver Do Monitor Aoc 519sw. Bieti), and the Arabian ( F. Margarita), among others. The domestic cat was first classified as Felis catus by in the 10th edition of his published in 1758.

Because of modern, domestic cats are usually regarded as another subspecies of the wildcat, F. This has resulted in mixed usage of the terms, as the domestic cat can be called by its subspecies name, Felis silvestris catus. Wildcats have also been referred to as various subspecies of F.

Catus, but in 2003, the fixed the name for wildcats as F. The most common name in use for the domestic cat remains F. Sometimes, the domestic cat has been called Felis domesticus as proposed by German naturalist in 1777, but these are not valid taxonomic names and have been used only rarely in scientific literature. A population of black feral cats was once classified as Felis daemon ( 1904) but now this population is considered to be a part of domestic cat.