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Standard IX
Biology
Question

Which avian feature indicates reptilian ancestry?
  1. Two special chambers, crop and gizzard in digestive tract
  2. Eggs with calcareous shells
  3. Scales on hind limbs
  4. Four chambered heart

A
Four chambered heart
B
Eggs with calcareous shells
C
Two special chambers, crop and gizzard in digestive tract
D
Scales on hind limbs
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Solution
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The correct option is C Scales on hind limbs
Aves share many characteristics with reptiles such as being vertebrates, having scales on part of their bodies and laying amniotic eggs with shells. All these common characters indicate that aves have reptilian ancestry.
So the correct option is " Scales on hind limbs".

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