Read each example and identify it with one of the mechanisms that influence gene pools. A zebra migrates to join a different herd of zebras. Competition for sunlight leads to taller trees. The DNA of

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Read each pattern and realize it after a while one of the mechanisms that wave gene pools. A zebra migrates to add a unanalogous mob of zebras. Competition for sunlight leads to taller trees. The DNA of a snake changes to effect its malice stronger. A grassfire randomly sweeps through a population of buffalo and kills most of the animals.

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