<P> 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 in the teaching of evolution . Sewall Wright described it as `` the clearest case in which a conspicuous evolutionary process has actually been observed . '' </P>
<P> 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 in the teaching of evolution . Sewall Wright described it as `` the clearest case in which a conspicuous evolutionary process has actually been observed . '' </P>
what caused natural selection among the peppered moths of manchester england
what caused natural selection among the peppered moths of manchester england
air pollution during the Industrial Revolution
air pollution during the Industrial Revolution