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Question

Which of the following are examples of homologous organs?

A
Forelimbs of frog and bird
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B
Arms of rabbit and human
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C
Forelimbs of lizard and bat
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D
Wings of butterfly and bird
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Solution

The correct options are
A Forelimbs of frog and bird
B Arms of rabbit and human
C Forelimbs of lizard and bat
Homologous organs are those organs which have similar structure and have evolved from a common ancestor, but differ in their function.
All the limb structures of vertebrates like frog, bird, bat, rabbit, human have common structure and origin but serve different funtions. Hence, they are homologous to each other.
Wings of a butterfly and wings of a bat, although serve the same function, have no common stucture or origin and hence are called analogous organs.

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