Question

Reptilian ancestry of birds is shown by the presence of

• A. Scales on hind limbs
• B. Non-cleidoic eggs
• C. Teeth in beak of birds
• D. Three chambered heart

Answer 1

The correct option is A Scales on hind limbs

The discovery that birds evolved from small carnivorous dinosaurs of the Late Jurassic ancestors of living birds began with a specimen of Archaeopteryx, the first known bird, discovered in the early 1860s. Though a bird's body is covered with feathers, they have scales on their legs and feet. Their beaks and claws have scales too which supported reptilian ancestry of birds.

So, the correct answer is 'Scales on hind limbs'.