Question

b) How the mammals are different
from aves. Explain the significance
of mammary gland and placenta
in mammals.​

Answer 1

Answer:

Aves have their body covered in feathers. Mammals have mammary glands. ... Aves have their forelimbs modified into wings.

The mammary gland is a highly evolved and specialized organ present in pair, one on each side of the anterior chest wall. The organ's primary function is to secrete milk. Though it is present in both sexes, it is well developed in females and rudimentary in the males.

Explanation:

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Answer 2

Explanation:

see the attached image above ...

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