Match each type of association with the best example:

1. commensalism
2. mutualism
3. parasitism
4. amensalism

a. A mold produces a chemical that kills bacteria without apparently benefiting
b. "Aerobic bacteria in the human colon consume oxygen, making it possible for anaerobic species to survive"
c. "Flagellates live in the gut of termites, feeding on the wood consumed by the termite and allowing the termite access to nutrition and energy in wood that they could not otherwise digest"
d. "A helminth takes up residence in a human digestive tract, consuming nutrients"

1. commensalism "Aerobic bacteria in the human colon consume oxygen, making it possible for anaerobic species to survive"

2. mutualism "Flagellates live in the gut of termites, feeding on the wood consumed by the termite and allowing the termite access to nutrition and energy in wood that they could not otherwise digest"

3. parasitism "A helminth takes up residence in a human digestive tract, consuming nutrients"

4. amensalism "A mold produces a chemical that kills bacteria without apparently benefiting"

Explanation:

1. commensalism: one species benefits while the other species neither benefit nor prejudiced  

2. mutualism: two species benefit

3. parasitism: one species benefits while the other species is prejudiced  

4. amensalism: one species is unaffected while the other species is prejudiced

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.