Answer:
Please find the explanation below
Step-by-step explanation:
Photosynthesis is the process whereby plant cells manufacture their energy source or food (glucose) in the presence of sunlight. Cellular respiration, on the other hand, is the process by which living cells release energy in form of ATP needed by their cells for cellular activities.
Living organisms eat or obtain take in food in order to obtain energy for their cellular upkeep. Plants are one of the only set of organisms that can produce their own food i.e. autotrophic and they do so via PHOTOSYNTHESIS. However, they need to undergo cellular respiration in order to breakdown the synthesized food to yield usable energy for their cells. These two processes in plants are direct metabolic opposite of one another.
Based on the explanation above, plants need to use both PHOTOSYNTHESIS AND CELLULAR RESPIRATION because the products of one yields reactant for the other. photosynthesis uses carbon dioxide released by cellular respiration while cellular respiration uses oxygen released by photosynthesis.