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Solution


Q.

Which of the following structures is homologous to the wing of a bird              [2016]
1 Hindlimb of rabbit  
2 Flipper of whale  
3 Dorsal fin of a shark  
4 Wing of a moth  

Ans.

(2)

Homologous organs have same fundamental structure but different functions. The wing of a bird and flipper of a whale are structurally forelimbs, which consist of humerus, radio-ulna, carpals, metacarpals and digits but they perform different functions. The wings of birds help them to fly while flipper helps the whale to swim.