Which of these structures relies on circulartory system to transport the chemical compuonds that it makes to other body structures

"The pituitary system" relies on circulatory system to transport the chemical compounds that it makes to other body structures

Explanation:

The pituitary gland plays a very vital role as it transfers the the messages from the brain and also utilizes the message for generation of hormones which affects different parts of the body which also includes the stimulating of all other hormone which are produced by their own hormone. The pituitary gland also regulates the secretion of the adrenal gland called cortisol as well as the thyroid gland secretion called thyroxine.

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.