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

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

Correct Answer:

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