The structural differences in genitalia of individuals belonging to different animal species interfere with mating. It is phenomenon called

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mechanical isolation

gametic isolation

behavioural isolation

temporal isolation

answer is A.

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Detailed Solution

Mechanical isolation = Two species are mechanically isolated from one another when their reproductive organs are too different from one another to allow interbreeding between the two species.Gametic isolation = The sperm and ova of different species of animals are unable to fuse.Behavioural isolation = The males of one animal species are unable to recognize the females of another species as potential mates.Temporal isolation = Breeding seasons or flowering time may be different in the two species.

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