Answers

2016-03-04T20:17:06+05:30
1.gene flow must be stopped so that sub-populations become genetically isolated.
2.mutation plays a role in speciation
3.changes in allele and genotype frequencies within the population,by natural selections.
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2016-03-04T20:17:40+05:30
1 . natural selection
2. genetic drift
3 . geographical isolation
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