AP BIOLOGY

Detailed explanation-1: -Allopatric speciation (1) occurs when a species separates into two separate groups which are isolated from one another. A physical barrier, such as a mountain range or a waterway, makes it impossible for them to breed with one another.

Detailed explanation-2: -In allopatric speciation, groups become reproductively isolated and diverge due to a geographical barrier. In sympatric speciation, reproductive isolation and divergence occur without geographical barriers-for example, by polyploidy.

Detailed explanation-3: -Sympatric speciation by sexual selection.

Detailed explanation-4: -Answer and Explanation: Greater habitat differentiation means there are more types of habitats in the same amount of geographical area. If there are more types of habitats, this presents a scenario in which one species could diverge into two species through sympatric speciation.

Detailed explanation-5: -Define. The physical isolation of the population due to the extrinsic barrier is called allopatric speciation. The evolution of new species from one ancestral species living in the same habitat is called sympatric speciation. Differentiation mechanism.