the peppered moth provides a well-known example of natural selection. the light-colored form of the moth was predominant in england before the industrial revolution. in the mid 19th century, a dark-colored form appeared. dark moths became more abundant, because they blended in with the soot-covered trees and were not eaten by birds. the difference between light and dark moths is a result of two alleles of a single gene. base on this information here, should the two forms of moths be considered different species?
