It has been discovered that this type of cell is found in humans and is more numerous in humans than there are human cells themselves. most of these are beneficial and aid in processes such as digestion and disease fighting, although some of them can be pathogenic. which of these types of cells is described here?

a)
bacterial

b)
eukaryotic

c)
protozoan

d)
viral

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.

c. is the correct answer