Does geographical isolation of individuals of a species lead to the formation of a new species? Provide a suitable explanation for your answer.

The formation of new species from the pre-existing ones is called speciation. When population of same species is divided into two groups which get separated from each other geographically by some barriers (mountain, ocean), they are unable to reproduce with each other. It leads to reproductive isolation. As a result, there is no exchange of genetic material between the two separated groups. Variations arise due to natural selection. Thus, geographical isolation gives rise to a new species.

For example, Darwin’s finches came into existence as a result of geographical isolation.