Photosynthesis occurs in light. Cellular respiration occurs in the dark. In the process of photosynthesis, plants need sunlight to produce energy. Photosynthesis is the process by which plants use light energy from the sun to produce their own food. Cellular respiration is a chemical process used by plants to release the chemical energy stored in glucose as usable chemical energy so that it can be used by plants. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an original essay A plant in the dark only performs respiration, but in the light it can perform both respiration and photosynthesis. Plants absorb carbon dioxide from the atmosphere. They also release carbon dioxide and oxygen into the atmosphere. All this shows that I agree with Mika. The sun is the main source of energy. The key is a chemical process called photosynthesis. Photosynthesis is also a chemical reaction. A chemical reaction is a process during which the atoms that make up one or more molecules are rearranged into differently shaped molecules. Sunlight captured by the plant during photosynthesis is stored as chemical potential energy within the glucose molecules produced by the plant. During photosynthesis, a chemical change occurs in the chloroplasts and plants transform carbon dioxide (CO2) and water (H2O) into glucose and oxygen (O2). Cellular respiration occurs in EVERY LIVING CELL. Without it, plants would not have access to the energy contained in sugar (glucose). Without energy, life cannot be maintained. The process of cellular respiration occurs in organelles called mitochondria. Glucose molecules enter the mitochondria and the mitochondria release the energy stored in the glucose molecules. Produced during cellular respiration, ATP provides cells with the energy needed for cellular activities. To release the stored energy contained in food molecules, the organism performs respiration. Photosynthesis produces glucose used in cellular respiration to produce ATP. The glucose is then converted back into carbon dioxide, which is used in photosynthesis. Plants absorb carbon dioxide from the atmosphere and use it as a carbon source for the sugars they produce, such as glucose (C6H12O6). Cellular respiration occurs within the mitochondria, and like photosynthesis, the process consists of many different ways. Please note: this is just an example. Get a custom paper from our expert writers now. Get a Custom Essay Plants perform both photosynthesis and cellular respiration. The reactants of photosynthesis are water and carbon dioxide. The products are glucose and oxygen. Light provides the energy needed to transform inorganic molecules into complex organic molecules. Cellular respiration breaks down complex organic molecules, releasing the energy they contain. The reactants of cellular respiration are glucose and oxygen. The products are carbon dioxide, water and ATP. All of this information shows why I agree with Mika.Works CitedCampbell, N.A., & Reece, J.B. (2008). Photosynthesis and cellular respiration. In Biology (8th ed., pp. 190-220). Benjamin-Cummings Publishing House. Taiz, L., & Zeiger, E. (2010). Photosynthesis: Carbon reactions. In Plant Physiology (5th ed., pp. 174-207). Sinauer Associates.Raven, P.H., Evert, R.F., & Eichhorn, S.E. (2016). Photosynthesis and respiration. In Plant biology (8th ed., pp. 186-229). W. H. Freeman and Company. Niyogi, K. K. (1999). Photoprotection revisited: genetic and molecular approaches. Annual review of plant physiology and biology.2018.01647