Question

5) What are mammals?​

Answer 1

Answer:

Mammal, (class Mammalia), any member of the group of vertebrate animals in which the young are nourished with milk from special mammary glands of the mother. … Hair is a typical mammalian feature, although in many whales it has disappeared except in the fetal stage.

Explanation:

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Answer 2

Answer:

a warm-blooded vertebrate animal of a class that is distinguished by the possession of hair or fur, females that secrete milk for the nourishment of the young, and (typically) the birth of live young