Question

A population of animals is split in half by a river. Before speciation is completed, the two halves are rejoined when a drought causes the river to run dry. How would this impact the two populations?

Answer 1

The gene flow would increase.

Step-by-step explanation:

Gene flow would increase between the two halves, and speciation would not occur.

Answer 2

Gene flow would increase between the two halves, and speciation would not occur