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Dictionary

Dar•win•ism

Pronunciation: (där'wu-niz"um), [key]
—n.
the Darwinian theory that species originate by descent, with variation, from parent forms, through the natural selection of those individuals best adapted for the reproductive success of their kind.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

Darwinian fitness

Darwin's finches

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