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In the case of peppered moth (Biston betularia) the black-coloured form became dominant over the light-coloured form in England during industrial revolution. This is an example of:

1. appearance of the darker coloured individuals due to very poor sunlight
2. protective mimicry
3. inheritance of darker colour character acquired due to the darker environment
4. natural selection whereby the darker forms were selected

Correct answer: natural selection whereby the darker forms were selected

Solution

The industrial revolution darkened tree trunks with soot, so black moths were better camouflaged and less likely to be eaten by birds. Over time, this differential survival and reproduction increased the frequency of the dark form, which is natural selection.

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