(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: B
Solution :
[b] Most birds have only one ovary and one oviduct. In early stages of embryonic development, each female bird has two ovaries, only the left one develops into functional organ.You need to login to perform this action.
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