A population of squirrels becomes divided into two halves by a flooding river. Over time, the river becomes larger and the populations are not able to interact for many years. Which of the following is the most likely outcome?
A) Both groups will become increasingly generalist
B) Geographic isolation may lead to speciation
C) Reproductive isolation may lead to speciation
D) Both species may become extinct
E) One group will be considered native and the other will be considered non-native

Question

Quizplus · Accepted Answer

Geographic isolation, which is caused by the flooding river in this case, can lead to genetic divergence and ultimately speciation over time. The lack of interaction between the two populations can allow for separate populations to evolve separately and potentially become different species. The other options (A, C, D, E) are less likely outcomes in this scenario.

A Population of Squirrels Becomes Divided into Two Halves by a Flooding