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23/10/2021 3:40 pm
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Which one of the following in birds, indicates their reptilian ancestry?
(1) Two special chambers crop and gizzard in their digestive tract
(2) Scales on their hind limbs
(3) Eggs with a calcareous shell
(4) Four-chambered heart
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23/10/2021 3:41 pm
Correct answer: (2) Scales on their hind limbs