For patterns of biological change VCE Biology requires knowledge about allopatric speciation, divergent and convergent evolution and extinction.
Allopatric speciation occurs when members of a population are split into separate groups, each of which is exposed to different selective forces. This often occurs in response to particular individuals being geographically isolated from the rest of a population such as by a river, mountains or islands. After a period of time, the selective pressures cause two distinct gene pools to develop that eventuate into two different species.
A type of evolution when similar features develop independently for organisms that are not closely related.This results from species living in similar environments , performing similar roles in the ecosystem and natural selection.
Humans over time have had a role in the extinction of some species due to the following actions:
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