Which one of the following indicates reptilian ancestry in birds?
Correct answer: B. Eggs with a calcareous shell
- 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
Explanation
Yes, both birds and reptiles lay eggs with a calcareous (calcium carbonate) shell, which provides protection and allows for gas exchange during embryonic development.
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