Question

which of the following could result in speciation from biogeographic isolation? the isolation of two populations of the same species 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

Explanation:

Speciation occurs when a new species is formed. Biogeographic isolation means separation due to geographical factors. For speciation to occur, there needs to be a significant separation of a group. A population is a group of individuals of the same species in a particular area. Isolating two populations of the same species can lead to them evolving separately (due to different environmental pressures, genetic drift etc.) and over time becoming different species. Isolating two individuals (too small a sample for evolution - not enough genetic diversity to drive speciation) or two populations of different species (they are already different species - can't form a new species from them in this context) or two individuals of different species (again, already different species) won't lead to speciation from biogeographic isolation.

Answer:

the isolation of two populations of the same species