What do you mean by following terms?
(a)Genetic drift
(b)Natural selection
(c)Reproductive isolation
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(a) Genetic drift is the variation in the relative frequency of different genotypes in a small population, owing to the chance disappearance of particular genes as individuals die or do not reproduce.
(b) Natural selection is the process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin, and it is now regarded as be the main process that brings about evolution.
(c) Reproductive isolation is unique in evolution because it is not a trait possessed by members of a single species, but a composite character that is the joint property of a pair of species. Reproductive isolation is a trait that almost always involves epistatic interaction between alleles – but alleles occurring in different species.
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(b) Natural selection is the process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin, and it is now regarded as be the main process that brings about evolution.
(c) Reproductive isolation is unique in evolution because it is not a trait possessed by members of a single species, but a composite character that is the joint property of a pair of species. Reproductive isolation is a trait that almost always involves epistatic interaction between alleles – but alleles occurring in different species.
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