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mammals and birds
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Mammals
The group of animals we call mammals is the best known class in the animal kingdom, mainly because it includes ourselves, as well as all the animals that are most familiar to us. Mammals are divided into three categories: placentals, whose young are born in an advanced state, marsupials, whose young are born in an embryonic stage, their development being completed in the mother’s pouch, and egg-laying mammals.
Mammals are defined as vertebrate animals with body hair, mammary glands and four limbs, which are modified into fins in most water mammals.
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Paper Information
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Title: mammals and birds
Words: 369
Rating: None
Pages: 1.5
submitted by: weevley
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