i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.
Answer from: Quest
The answer is a i believe
Another question on Biology
Biology, 22.06.2019 03:00
What happens during interphase? (1)the nucleus grows to its full size. (2)the cell grows to its full size. (3)the nucleus divides into two nuclei. (4)the cell divides into two cells.
When an object is moving away from you while still making a sound, the pitch of the sound is perceived to a. lower b. unchanged c. fluctuating d.higher