Archaeplastida, which include red and green algae and land plants, are thought to have descended from a heterotrophic protist that engulfed a(n) .

The correct answer is - cyanobacterium.

Explanation:

According to the endosymbiotic theory eukaryotic cells are rise through the engulfing the endosymbiotic cyanobacteria by prokaryotic cells and from cells with specialized cell structure like chloroplast and mitochondria.

Archaeplastida are all the plant kingdom with red green algae and land plants included in this group are descended from heterotropic protist by the process of engulfed an cyanobacteria.

Thus, the correct answer - cyanobacteria.

the correct answer is b. possesses the characteristic of compartmentalization of organelles, wherein the organelles are bound by membranes.

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.