First slide

Classification of Animals

Question

Aves originated from reptiles. Which of the following is not an advancement of birds over reptiles?

Moderate

A

Homeothermy
B

Complete double circulation
C

Insulated body
D

Internal fertilisation

Solution

Both reptiles and birds exhibit internal fertilisation and thus it is not an advancement in birds.
Homeothermy, complete double circulation and insulated body are observed only in the birds (not in reptiles) and thus are advancements over reptiles.

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