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CBSE Class 10 Answered

define variation,heredity, genetic drift,organic evolution.
Asked by sangavi519 | 01 Oct, 2009, 08:50: AM
Expert Answer

Evolution is a gradual and continuing process of change that occur over a period of time, due to slight variations in genetic compositions as well as changes in environment, leading to formation of new species.

 

Genetic drift is the random change in the frequency of genes or factors in a population over successive generations in a small population, presumably owing to chance rather than natural selection.

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Answered by | 04 Oct, 2009, 06:39: AM
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