This can occur when part of a population of a species becomes separated from the remainder, they may over time evolve different characteristics from the parent population.

When part of a population of a species gets separated from the remainder, it is termed as geographical isolation. It may evolve different characteristics due to genetic change over a period of time. If geographical barriers are removed by the humans, members of two populations will be unable to mate successfully each other and as a result new species will emerge. The formation of new species is termed as speciation. Speciation due to geographical isolation is called allopatric speciation

not sure but try c two haploid cells

explanation:

answer: decrease

a limiting factor is the one which decrease the abundance, distribution and causes extinction of the population of species in a ecosystem. here, predators including hawks, owls and snakes are the limiting factor for the population of mexican free tailed bat.   although bats are nocturnal animals as they forge for food at night these predators also may remain active during night which can decrease the population of the mexican free-tailed bats. also, these bats eat only one type of insects that are moths. the food can also be a limiting factor as all 400 members are dependent upon same type of food needs that are moths. the decrease in the moth population can cause decrease in population size of the mexican free-tailed bats.

therefore, the scenarios will most likely to decrease the population size of the mexican free-tailed bats.