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Characteristic features such as four - C...

Characteristic features such as four - Chambered heart feather and pseumatic bone is applicable to the class of vertebrate

A

Cyclostomata

B

Aves

C

Reptilia

D

Mammals

Text Solution

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The correct Answer is:
B
Aves have the characteristic feature of four chambered heart, forelimbs are modified into wings that are covered with feather and bones are pneumatic or hollow easy for flying
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