Q21 of 51 Page 7

List in the tabular form any three differences between the Aves and Mammalia group.

Differences between the Aves and Mammalia group:


Aves

Mammalia

Body is covered with feathers.

Body is covered with hairs.

Bones are hollow with air cavity for flying.

Bone is not hollow.

They are oviparous.

They are viviparous with few exceptions

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