Eukaryote cells have a nucleus of course , and also you’ll see that its larger and has a cell membrane .
Alot of humans might not now they are even harming the systems by smoking or littering.
In a red blood cell, the control center is the nucleus. A mitochondria is not a nucleus. It is another organelle that produces energy for the cell.
I think it is D. You experience increase in breathing rate to obtain more oxygen which is delivered to cells through the bloodstream
