Is it true that a parfocal microscope allows you to quickly focus using the low power or scanning lens and then to switch a higher power lens with only a minimal adjustment of the fine focus know? (the first question on the paper)

Residential construction is expanding in florida, the expansion has caused fragmentation of habitats, one of the results of the increased construction is a decrease in the number of large predators such as the coyote, black bear and pool panther, which will be the most immediate local result of this fragmentation? 1)large predators will become extinct 2)decrease in middle sized predators 3)increase in population of top carnivores 4)increase in population of prey species