Biology, 12.08.2020 18:01 zarek93

What is a defining feature of mammals that is not present in most other vertebrates? A. Mammals can produce milk for their offspring.

B. Mammals maintain a constant body temperature.

C. Mammals reproduce through internal fertilization.

D. Mammals have a nervous system with a spinal cord.

(Pls I need help!)

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What is a defining feature of mammals that is not present in most other vertebrates? A. Mammals can...

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