How does cellular respiration help heal a bruise? It produces the oxygen used to heal cells. It produces the glucose used to heal cells. It produces the energy used to heal cells. It produces the mitochondria used to heal cells.

If there was no gravity then their would be no downword force on the football to have it return the the grownd, and if there was no friction (mainly air friction) then there would be no opposing force the stop the ball from moving through the air allowing the ball to travle ∞.

The answer is 12, for the points