Question

assuming the populations of fruit flies are the same size, the length of time necessary for significant divergence to take place in the populations depends on
○ how quickly the fruit flies can fly between the two habitats
○ the area of the two mountain habitats
○ the kinds of mutations in the populations and the similarity of the two isolated habitats
○ the absence of natural selection
○ the rapid restoration of contact between the two populations

Explanation:

Significant divergence in populations depends on genetic changes (mutations) and environmental differences. Mutations introduce new genetic variation, and different habitats can drive natural - selection in different directions. Similar habitats would slow divergence, while different ones would speed it up.

Answer:

the kinds of mutations in the populations and the similarity of the two isolated habitats