Question

question 10 of 10 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? a. the two halves would be reproductively isolated. b. speciation would still occur, because the two halves would be too different genetically to interbreed. c. individuals could now freely mate, and gene flow would increase. d. traits that had developed through mutation would still exist only in one of the halves.

Explanation:

When the two halves of the population are rejoined before speciation is complete, they are still the same species. So individuals can freely mate and gene - flow between them will increase as there is now contact and exchange of genetic material.

Answer:

C. Individuals could now freely mate, and gene flow would increase.