Question

!Plz help! !I keep getting different answers! Cellular respiration refers to:

a. breathing.
b.the diffusion of oxygen into the cells.
c. the transfer of O2 and CO2 across a cell membrane
d. the production of ATP from energy rich compounds

Answer 1

A.breathing

Step-by-step explanation:

I'm sorry if this is wrong but I'm 99% sure this is right!

Hopefully this helped! :)