What is the correct answer?


Which of the following statement(s) is/are correct regarding class aves?
(i) The forelimbs are modified into wings and the hindlimbs generally have scales and are modified for walking, swimming or clasping the tree branches.
(ii) Heart is completely four-chambered.
(iii) They are warm- blooded (homoiothermous) animals i.e., they are able to maintain a constant body temperature.
(iv) They are oviparous and development is direct.

A. Both (i) and (iii)

B. Both (i) and (iv)

C. (i), (ii) and (iii)

D. All of these

Correct Answer :

D. All of these

Aves are warm blooded, oviparous, bipedal flying vertebrates with an exoskeleton of feathers. Forelimbs are modified as wings for flying and hind limbs are adapted for walking, perching and swimming.

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