ev·o·lu·tion [èvvə lsh’n, və lsh’n]
(plural ev·o·lu·tions)
n
1. biology theory of development from earlier forms: the theoretical process by which all species develop from earlier forms of life.
On this theory, natural variation in the genetic material of a population favors reproduction by some individuals more than others, so that over the generations all members of the population come to possess the favorable traits.
Biology is a science!