Reproducing asexually has some major advantages including all the following except:

rapid rate of reproduction
ability to inhabit an area rapidly
genetic variability
no time spent on finding a mate

I believe the answer is genetic variability

answer; i believe its (ovulation);

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.