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rube
the speciation, or a divergence of the population into a separate species, will can take two forms: allopatric, where a physical barrier seperates populations (darwin's finches), also the sympatric, where the  population sharing the geographic location is forced by a environmental factors to diverge. once they have diverged, either prezygotic or postzygotic barriers can prevent interbreeding between the two species. prezygotic barriers.
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Process of population occurs when allele frequency in a population may change due to fundamental forces of evolution.

For example natural selection, genetic drift, gene flow and mutation. This process takes place when new traits transfers genes between populations for example between species or in migration.

Speciation of population to separate species will take forms like sympatric and allopatric. In allopatric is where a physical barrier is been able to separate population why sympatric the population which is sharing the geographical location is formed by environment factors to separate.

If they are separated post zygotic or prezygotic between species.

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