Characteristic features such as four-chambered heart, feather and pneu – McqOptions

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1.	Characteristic features such as four-chambered heart, feather and pneumatic bone is applicable to the class of vertebrate [Orissa JEE 2002]
A.	Cyclostomata
B.	Aves
C.	Reptilia
D.	Mammals
Answer» C. Reptilia

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