Consider the scenario in which Mutants A and B are grown in a medium that contains His, but does not contain Trp. For this scenario, sort the descriptions that apply to Mutant A or B. Remember:
Mutant A: Overproduces His and cannot produce Trp
Mutant B: Cannot produce His and overproduces Trp

Attached below is the missing part of your question

answer

Mutant A

1) Requires tryptophan in the growth medium or from a donor mutant

2) Must form nanotubes to obtain it's required amino acid in this scenario:

Mutant B

1) Requires histidine in the growth medium or from a donor mutant

2) Does not need to form nanotubes to obtain it's required amino acid in this scenario:

Explanation:

Mutant A ( Over produces His and cannot produce Trp )

1) Requires tryptophan in the growth medium or from a donor mutant ; This is because the Mutant is an auxotroph for tryptophan.

2) Must form nanotubes to obtain it's required amino acid in this scenario:

This is because growth medium of the mutant is supplemented with  histidine

Mutant B ( cannot produce His and overproduces Trp )

1) Requires histidine in the growth medium or from a donor mutant :

This is because Mutant B lacks the biosynthetic pathways necessary for histidine production

2) Does not need to form nanotubes to obtain it's required amino acid in this scenario: because the Mutant cell can easily take up the required amount of Histidine from its surroundings.

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.