Which type of selection is industrial melanism observed in moth,
Biston betularia?

Stabilising

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Directional

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Disruptive

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Artificial

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Solution

The correct option is B Directional
In directional selection, the population changes towards one particular direction. It means this type of selection favours small or large-sized individuals and more individuals of that type will be present in next generations. The mean size of the population changes. Examples are evolution of DDT resistant mosquitoes, industrial melanism in peppered moth and evolution of giraffe.
So, the correct answer is 'Directional'.

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