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Q.

Which of the following are homologous organs?

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a

Brain of a bird and that of a mammal 

b

Wings of cockroach and that of crow

c

Fins of shark and flippers of whale

d

Sting of scorpion and that of honeybee

answer is A.

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Detailed Solution

Vertebrate hearts or brains are homologous structures. Homology indicates common ancestry. Both birds and mammals have evolved from reptiles. 

The other options are examples of analogous structures.

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