What is this? Please answer with an explanation

It's C.

Explanation:

The process of nitrification is that is a process that converts ammonia to nitrite and nitrite to nitrate. It is an important step in the global nitrogen cycle. It is exclusively carried out by prokaryotes, which is a group of organisms called bacteria.

hope this helps!! :))

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.