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JIPMER2014BotanyAnimal Kingdom

Which one of the following in birds indicates their reptilian ancestry?

Options

  1. AScales on their hindlimbs
  2. BFour-chambered heart
  3. CTwo special chambers crop and gizzards in their digestive tract
  4. DEgg with a calcareous shell

Correct answer

D. Egg with a calcareous shell

Step-by-step solution

The birds have evolved from reptiles. Both birds and reptiles lay eggs which are large and telo lecithal with thick hard calcarious shell i.e., cleiodic eggs.

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