Which one of the following in birds, indicates their reptilian ancestry?
A. Two special chambers crop and gizzard in their digestive tract
B. Eggs with a calcareous shell
C. Scales on their hind limbs
D. Four-chambered heart
Answer:C
Which one of the following in birds, indicates their reptilian ancestry?
A. Two special chambers crop and gizzard in their digestive tract B. Eggs with a calcareous shell C. Scales on their hind limbs D. Four-chambered heart