Question

which of these could result in speciation from biogeographic isolation? the isolation of two individuals of the same species the isolation of two populations of different species the isolation of two individuals of different species the isolation of two populations of the same species

Explanation:

Speciation from biogeographic isolation occurs when a population of the same species is separated geographically. Isolating two individuals (even same species) is too small a unit to drive speciation. Isolating different - species populations or individuals doesn't lead to speciation of a new species (since they are already different). Isolating two populations of the same species can lead to genetic divergence over time, resulting in speciation.

Answer:

the isolation of two populations of the same species