Cells help organisms carry out many processes, such as
A.
maintenance.
B.
reproduction.
C.
growth.
D.
all of these

D. all of these

Explanation:

Cells are the simplest functional unit of our body. They perform maintenance of nutrients and such, they replicate hence reproduce more cells, and this follows them being able to grow as well.

step 1 ammonium can be absorbed by plants, but some is converted into nitrates which are better for plants to absorb. this is called nitrification. 2. step 2 the deer eats the plants and uses the nitrogen-containing proteins for cell growth. 3. step 3 bacteria in the soil conduct nitrogen fixation to convert nitrogen gas from the atmosphere into ammonium. 4. step 4 some of the nitrates are absorbed back into plants, but denitrification breaks down the nitrates into nitrogen gas released back into the atmosphere. 5. step 5 nitrogen is found in the urine, which gets broken down into ammonium through the process of ammonification. 6. step 6 plants absorb the ammonium and begin assimilation, the process to add the nitrogen to protein.

explanation:

okay now i don't know this but for the pints nothing else to say bye