Question

1. which process in the nitrogen cycle turns dead plants and animals into ammonium? fixation nitrification assimilation ammonification denitrification

Explanation:

Ammonification is the process in the nitrogen - cycle where decomposers break down dead plants and animals and convert the organic nitrogen within them into ammonium. Fixation is the conversion of atmospheric nitrogen to ammonia or other nitrogen - containing compounds. Nitrification is the conversion of ammonia to nitrites and then to nitrates. Assimilation is the uptake of nitrogen compounds by plants and animals. Denitrification is the conversion of nitrates to nitrogen gas, returning it to the atmosphere.

Answer:

D. Ammonification