Answer:
Uh, I'm not sure if this qualifies as an actual question for any subject. I'm sure you have nice cats though.
I believe it is ph level,but I don't know for sure.
Phospholipids, 2 layers. The cell membrane is selectively permeable to ions and organic molecules and controls the movement of substances in and out of cells. The basic function of the cell membrane is to protect the cell from its surroundings. It consists of the lipid bilayer with embedded proteins.
The answer is b because it is negative on our world