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One of the most evident example of directional selection ‘Industrial melanism’ as observed in moths proves that
The true black melanic form of moth or dark -winged moth arise by a recurrence of random mutation
The melanic form of a moth or dark-winged moth has no selective advantage over lighter form in an industrial area.
The lighter form of moth or white winged moth has no selected advantage either in polluted or non- polluted areas.
Melanism is a pollution generated feature.
Answers (1)
As we have already discussed in the Mechanism of Evolution: Natural Selection & Its Types -
Industrial melanism is a term used to describe the evolutionary process in which darker individuals come to predominate over lighter individuals since the industrial revolution as a result of natural selection. Hence, the correct option is (a).
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