asked 87.4k views
5 votes
What characteristics are used to
classify mammals into each of their groups?

2 Answers

2 votes
The main difference between mammals and other vertebrates are three characteristics: hair, milk production in mammary glands, and three bones in the inner ear. Extant mammals are divided into three subclasses based on reproductive techniques
answered
User Dessalines
by
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4 votes

Answer:

The way they feed

The way they develop

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User Xvtk
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