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.

because they want 2 and yea

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.