I think it is keystone. If they were not there the population of urchins would go up and the kelp would go down.
Yes, If there were no concentration gradient of protons across the thylakoid membrane, the ATP synthase would not be able to convert ADP to ATP.
Answer:
D the current changes are mush smaller than in the past.
Answer:
C
Explanation:
There are several cells, therefore it is multicellular. They also have nuclei, meaning that this organism is a <em>multicellular eukaryote.</em>
As diatoms are made from silica this makes diatomaceous earth very abrasive, and so the sharpness enhances the particles as a pesticide. Diatoms are also useful in forensic studies. If a person has drowned then diatoms are able to enter the human body.
