What happens to the nitrogen excreted by animals?

a
nitrogen is converted into ammonia.
b
nitrogen is released back into the environment.
c
nitrates are converted into proteins.
d
nitrates are reabsorbed by the animal.

Nitrgen Cycle

Explanation:

Animal waste includes nitrogen that passes through the nitrogen cycle, these steps summarise into:

The nitrogen cycle moves nitrogen back and forth between the atmosphere and organisms.

Bacteria change nitrogen gas from the atmosphere to nitrogen compounds that plants can absorb.

Other bacteria change nitrogen compounds back to nitrogen gas, which re-enters the atmosphere.

a metamorphic rock would be formed.

d. cellulose and starch