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Biology, 23.09.2019 16:30 lovepink6524

Mammals are characterized by
a. warm-bloodedness and feathers.
b. hair and feathers.
c. mammary glands and hair.
d. hair and shelled eggs.

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You know the right answer?
Mammals are characterized by
a. warm-bloodedness and feathers.
b. hair and feathers.

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