Question

Which is not aerial adaptation of Birds [RPMT 2001]
A) Single ovary
B) Pneumatic bone
C) Gizzard
D) Keeled sternum

Answer 1

I think that option (B) is correct pneumatic bone

Answer 2

Answer:

Gizzard is not an aerial adaptation of the birds.

Explanation:

All the other options such as the single ovary helps the bird in the flight by reducing its overall weight, the pneumatic bone helps the bird in the flight and supports the flying, the kleenex sternum is an attachment to the flight bone whereas the gizzard is not involved in the basic requirement for a bird and thereby not an aerial adaptation.