Which of the following situations is least likely to lead to geographic isolation, hence inhibiting allopatric speciation?
A) An eight-lane highway divides a population of snails with limited mobility.
B) A narrow, but deep, river divides a population of hummingbirds.
C) A narrow, but deep, river divides a population of white-footed mice (not known for their swimming ability).
D) A patch of land bisects a river and divides a population of minnows.
E) A mountain range divides a population of moths.

Question

Quizplus · Accepted Answer

Hummingbirds can fly over the river, so the river is less likely to cause geographic isolation for them compared to the other scenarios.

Which of the Following Situations Is Least Likely to Lead