I'm not quite sure what you mean by which sphere, but I found that the most abundant gas on earth is nitrogen at 78%. Hope this helps
6. A
7. A
8. ?
9. A
10. A
i know A being the answer for all is kind of weird but i am pretty sure that’s what the answers are
I believe it is D, to protect weakened ecosystems and their wildlife
Answer:
The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell, and that membrane has several different functions. One is to transport nutrients into the cell and also to transport toxic substances out of the cell.
Explanation:
