Question

the following diagram describes the nitrogen cycle. arrow c shows nitrogen moving from dead organisms and waste to the soil.
which process is represented by arrow c?
choose 1 answer:
a denitrification
b nitrogen fixation
c nitrification
d ammonification

Explanation:

To determine the process of Arrow C, we analyze each option:

• Denitrification (A) is the conversion of nitrates to nitrogen gas, not related to dead organisms/waste to soil.
• Nitrogen fixation (B) is converting atmospheric \(N_2\) to ammonia, not from dead organisms.
• Nitrification (C) is converting ammonia to nitrates, not from dead organisms to soil.
• Ammonification (D) is the process where decomposers break down dead organisms and waste, releasing ammonia (or ammonium) into the soil, which matches Arrow C's description (nitrogen from dead organisms/waste to soil).

Answer:

D. ammonification