Question

A population of organisms becomes separated by a large canyon. Over millions of years, the organisms on one side of the canyon become much different from the organisms on the other side of the canyon. Eventually the populations are genetically different enough that they can no longer interbreed. This example can best be described as

Answer 1

Explanation:

Allopatric speciation occurs when a geographical barrier, like a river, mountain, or canyon, separates members of a population. This barrier prevents the individuals on one side from reproducing with the individuals on the other. In addition, selecting forces may act differently on the two sides of the barrier. This separation eventually results in two distinct species.

Allopatric speciation occurs when a geographical barrier, like a river, mountain, or canyon, separates members of a population. This barrier prevents the individuals on one side from reproducing with the individuals on the other. In addition, selecting forces may act differently on the two sides of the barrier. This separation eventually results in two distinct species.Here, the only example of allopatric speciation is that regarding the squirrels separated by the river. The example with the hawks refers to sympatric speciation, where no geographical barrier exists, but speciation can still occur due to other stressors. The remaining choices do not describe speciation at all.