define organic evolution in three
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organic evolution The process by which changes in the genetic composition of populations of organisms occur in response to environmental changes.The theory of evolution by natural selection, first formulated in Darwin's book "On the Origin of Species" in 1859, is the process by which organisms change over time as a result of changes in heritable physical or behavioral traits.
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The process by which changes in the genetic composition of populations of organisms occur in response to environmental changes.
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