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What are the four steps of natural selection?

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Quick Answer

The four steps or conditions necessary for natural selection to occur are that more organisms are born than can survive, characteristics vary within a species, variations are inherited, and differences in reproduction and survival are due to variations. All four of these conditions must occur for natural selection to happen.

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Full Answer

The basic mechanisms of evolution include natural selection, genetic drift and mutation. Natural selection is a process in which the population of organisms that have adapted to their environment increases more than the population of less well-adapted forms. This concept was first explained in Charles Darwin's theory of evolution. Natural selection is sometimes referred to as "survival of the fittest."

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