Which statements explain the relationship between photosynthesis and cellular respiration? Check all that apply. The glucose that plants use for energy is made by animals in cellular respiration. Glucose is a reactant in both photosynthesis and cellular respiration. The oxygen released by photosynthesis is breathed in by animals to break down glucose. Carbon dioxide is a product of both photosynthesis and cellular respiration. The carbon dioxide released by animals is used to build glucose in photosynthesis.