1. In , a population isolated by a geographic barrier becomes a new species as it accumulates changes by natural selection or genetic drift.
2. In , a new species may arise as mating and gene flow are reduced between populations that share the same area.
3. Many plant species have formed by , in which accidents in cell division result in extra sets of chromosomes.
4. Both allopatric speciation and sympatric speciation depend on the establishment of , which prevent(s) gene flow between a new species and its parent species.
5. occur(s) when a species gives rise to many new species after colonizing a region with diverse habitats.
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1. In , a population isolated by a geographic barrier becomes a new species as it accumulates change...
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