How are photosynthesis and cellular respiration related? A.Energy is continuously cycled between the two processes. B.They each occur in completely different organisms. C.Both depend on ATP as a source of energy. D.Materials produced in one process are used in the other Which of the following events represents a disruption in access to the energy source needed by an organism? A.A weed is uprooted from the soil. B.Oxygen is removed from the water in a fishs bowl. C.A cactus is moved from a sunny windowsill to a dark room. D.The water bowl is removed from a hamsters cage.