The electron microscope has revealed that one of the components within the cell consists of pinwheel array of 9 triplets of microtubules arranged to form a hollow tube. this structure is a

centrioles

Explanation:

Centrioles are formed by 9 main microtubules each having a pair attached to it. Centrioles are rod-shaped structures located just outside the nuclear membrane. They form spindle fibres during cell division in animal cells. They also form cilia and flagella in protozoans.

answer: a) a compound microscope has a greater magnification ability than a simple microscope.

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.