In what stage of meiosis is crossing over most likely to occur?
a. prophase i
b. anaphase ii
c. metaphase i
d. prophase ii

Option A, Prophase I

Explanation:

It is during the prophase I stage of meiosis when chromatic tetrads exchange their chromosomes followed by disappearance of  nucleus envelope.

In Meta phase I,  the chromatic tetrads arrange themselves along the equator.

In Anaphase II, sister chromatids (within each chromosomes) seperate from each other and move towards the opposite end of the cell.

In Prophase II, haploid cells formed in meiosis I condenses their chromosomes.

Hence, option A is correct.

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.