Question

In England. after industrialization (1920), the dark-variety of peppered moth (Biston carbonaria) outnumbered light-variety (Biston hetularia) this can be represented by:

Answer 1

The evolution of the peppered moth is an evolutionary instance of directional colour change in the moth population as a consequence of air pollution during the Industrial Revolution. The frequency of dark-coloured moths increased at that time, an example of industrial melanism. Later, when pollution was reduced, the light-coloured form again predominated. Industrial melanism in the peppered moth was an early test of Charles Darwin's natural selection in action, and remains as a classic example.