What characteristics are used to classify mammals into each of their groups?

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asked Jul 24, 2022 87.4k views

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Dessalines · Answer 1 · 2022-07-26T02:46:30+0000

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

What characteristics are used to classify mammals into each of their groups?

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