Question

The phenomenon of fusion is likely to occur when, after a period of geographic isolation, two populations meet again and _____?

1) an increasing number of infertile hybrids is produced over the course of the next one hundred generations
2) no reproduction occurs in the hybrid zone
3) an increasing number of viable, fertile hybrids is produced over the course of the next one hundred generations
4) a decreasing number of viable, fertile hybrids is produced over the course of the next one hundred generations

Answer 1

Fusion is likely to occur when two populations that have been geographically isolated meet again and an increasing number of viable, fertile hybrids is produced over time.

Step-by-step explanation:

When two populations that have been geographically isolated meet again, the phenomenon of fusion is likely to occur when an increasing number of viable, fertile hybrids is produced over the course of the next one hundred generations (option 3). This means that the two populations interbreed and produce offspring that are capable of reproducing and surviving. If the hybrids are less fit than the parents, reinforcement occurs instead and the two species continue to diverge.