Speciation that results from the formation of a geographic feature that isolates some members of a population from other members is an example of:
a. allopatric speciation
b. directed speciation
c. stabilizing speciation
d. sympatric speciation

A student argues that being separated geographically is the only way for speciation to occur. Why is he wrong?

Speciation does not usually rely on geographic isolation.

Speciation can occur from biological forces as well. **

Speciation can occur from variation as well.

Speciation does not result from adaptive radiation.

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.  

a = executive branch; b = judicial branch