AP BIOLOGY

Detailed explanation-1: -Take note that Darwin stated that variation must exist in a population before natural selection occurs in a population and evolution is the result of genetic variation due to the mutation in the genetic material, mutation and genetic material, mutation and genetic material.

Detailed explanation-2: -Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.

Detailed explanation-3: -Natural selection occurs only if there is both (1) variation in the genetic information between organisms in a population and (2) variation in the expression of that genetic information-that is, trait variation-that leads to differences in performance among individuals.

Detailed explanation-4: -Natural selection happens only if the following four requirements are met, according to evolution theory. They are as follows: heredity, reproduction, physical traits that differ, and variation in the number of offspring produced by each individual.