nat'ural selec'tion

the process by which forms of life having traits that better enable them to adapt to specific environmental pressures, as predators, changes in climate, or competition for food or mates, will tend to survive and reproduce in greater numbers than others of their kind, thus ensuring the perpetuation of those favorable traits in succeeding generations. Cf. survival of the fittest.

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

natural sciencenatural theology
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