The movement of substances across the cell membrane either into or out of the cell
I would assume B as your final
Answer
<span>Synthetic cathinones, more commonly known as "bath salts," are synthetic drugs chemically related to cathinone, a stimulant found in the khat plant. Khat is a shrub grown in East Africa and southern Arabia, and people sometimes chew its leaves for their mild stimulant effects. Synthetic variants of cathinone can be much stronger than the natural product and, in some cases very dangerous. This the correct answer :)</span>
Nitro fixation is the process in which bacteria returns nutrients to the soil
