Q.

Among the following sets of examples for divergent evolution, select the incorrect option.

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a

Forelimbs of man, bat and cheetah

b

Heart of bat, man and cheetah

c

Brain of bat, man and cheetah

d

Eye of octopus, bat and man

answer is D.

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Detailed Solution

Eye of octopus, bat and man are not an example for divergent evolution. They are the analogous structures that evolved as a result of convergent evolution. The cephalopod eye forms as invaginations of the body surface while that of vertebrates forms as an outgrowths of the brain. Unlike in the vertebrate eye, there is no blindspot in the cephalopod eye because the nerve fibres route behind the retina.

The following are all examples of divergent evolution:

Forelimbs of man, bat and cheetah      

Heart of bat, man and cheetah   

Brain of bat, man and cheetah 

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