LIFE SCIENCE

Detailed explanation-1: -Prior to the industrial revolution in England (pre-1740), the peppered moth was found almost entirely in its light form (light body colored with black spots). The moths would spend daylight hours on trees covered by light colored lichen, their light colors giving them almost perfect camouflage against predatory birds.

Detailed explanation-2: -As a result of the common light-coloured lichens and English trees, therefore, the light-coloured moths were much more effective at hiding from predators, and the frequency of the dark allele was very low, at about 0.01%.

Detailed explanation-3: -During the early 19th century in Britain, the moths used to have salt-and-pepper coloring. But over the years black versions of the moth began to prevail. These days, the dark variants are the most common, and geneticists have long speculated that the Industrial Revolution is to blame.