A) reproductive isolation
B) induced mutation
C) natural selection
D) geographical isolation
Correct Answer: C
Solution :
Industrial melanism refers to the occurrence, of dark (melanic) forms (of insects) in regions with high industrial pollution-where surfaces on which the insects rest are darkened by root and where atmospheric \[S{{O}_{2}}\] level are high enough to prevent the growth of lichens. The mutant dark forms of insects would not be easily seen and avoid being preyed; thus, the population of dark forms of insects would increase natural selection being in their favour as compared to lighter forms, which could be easily sighted and eaten.
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