Answer:
speciation occurs
Explanation:
When some organisms from an original population colonize a new habitat and become geographically isolated from the source population, the accumulation of genetic variations leads to reproductive isolation of these two populations.
Over generations, the isolated populations evolve into two separate species as they are unable to interbreed when allowed to do so.
The geographical isolation of two populations of a species followed by the accumulation of genetic variations leads to allopatric speciation.
