Question

which one of the following in birds,indicates their reptilian ancestory
A)scales on their hind limbs
B)four-chambered heart
C)two special chambers crop and gizzard in their digestive tract
D)eggs with a calcareous shell.

Answer 1

Option A- scales on their hind limbs


__________

Hope it helps!

Answer 2

I think A) scales on their hind limbs.

Reptilian ancestory in birds is indicated by scales on their hind limbs.

hope it helps..