Difference between revisions of "Mammal"
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The first true mammals appeared in the early [[Jurassic]]. | The first true mammals appeared in the early [[Jurassic]]. | ||
| − | [[Category:Mammals]] | + | [[Category:Mammals| ]] |
Revision as of 05:08, March 27, 2007
Mammals are a class of vertebrate animals scientifically known as the Mammalia. They are primarily characterized by the presence of mammary glands in the female which produce milk to feed their young, which (except in the case of the Monotremata which lay eggs), are born live. Mammals are warm-blooded and most are hairy.
The first true mammals appeared in the early Jurassic.