Answer:
Geographical Isolation
Explanation:
Lava serves as geographical barrier to separate the two populations of monkey. These two isolated populations accumulate variations and gradually become reproductively isolated. Reproductive isolation brought about by geographical isolation leads to formation allopatric species which are now present in different geographical regions.
Answer:
Geographical Isolation
Explanation:
Geographic isolation consists of separating a population by a geographical barrier, thus forming subpopulations. The geographical barrier can be a river, a mountain or a volcanic eruption, as shown in the question above.
As a result of geographic isolation, subpopulations begin to suffer different pressures and consequently the genes selected in one subpopulation will be different from the other subpopulation. Due to the geographical barrier, the two subpopulations will be prevented from crossing and the differences between them will become increasingly pronounced. Thus arose the subspecies.
