Fetch
(sry have to make an answer 20 characters /!:!27837)
Explanation:
Because there's a higher concentration of oxygen molecules outside the cell compared to the cell's cytoplasm, you'll see that oxygen diffuses into the cell along this concentration gradient. ... Because the molecules are moving at random, some will move out of the cell, but most will be moving in in this case.
I believe ATP is the compound that does most of the work to carry out cell processes.
