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 Natural selection, gene flow and random genetic drift (the random change in gene combinations with each generation) drive evolution, resulting in a change in gene frequencies within populations .
Adaptation is a continuous response to the environment by changeable species.
Evolution & Ecology " (see its HOME PAGE .) The result is that some areas, such as the glossary are shared.
Widgets Human evolution from an ancestral primate species is not a vague hypothesis, but a historical fact.
sapiens (including Neanderthals and Cro-Magnon) (see the modern taxonomic classification of humans).
This formed the foundation of the neo-Darwinian evolutionary theory.