What protein plays an important function in the cells shown and would be found in abundance within the cells

Hemoglobin

Explanation:

I'm assuming those cells are red blood cells because of the disk-like shape. Hemoglobin is the most abundant protein in red blood cells.

the answer is trees if i'm not mistaken

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.