Final answer:
Carbon dioxide is used in photosynthesis to produce glucose and oxygen, whereas in respiration, glucose and oxygen are used to create energy, releasing carbon dioxide and water as waste products.
Step-by-step explanation:
In the process of photosynthesis, plants use sunlight to convert carbon dioxide and water into glucose, a type of sugar, and oxygen. Carbon dioxide plays a crucial role as an ingredient that is 'fixed' or converted into glucose in the light-dependent reactions. This occurs in the chloroplasts of the plant cells.
On the other hand, respiration is the process by which organisms convert glucose and oxygen into energy, releasing carbon dioxide and water as waste products. This process occurs in the mitochondria of the cell. In a way, photosynthesis and respiration can be thought of as opposite processes, with photosynthesis 'fixing' carbon dioxide and respiration releasing it.
Learn more about Photosynthesis and Respiration