Which of the following is NOT a product of photosynthesis?

Photosynthesis is the process through which green plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose. During photosynthesis, carbon dioxide and water are used as raw materials. The process occurs in the chloroplasts of plant cells, where sunlight is captured and utilized to transform carbon dioxide from the air and water from the soil into glucose, a sugar that serves as an energy source for the plant.

One of the byproducts of photosynthesis is oxygen, which is released into the atmosphere as a result of the splitting of water molecules during the process. Thus, substances like glucose and oxygen are direct products of photosynthesis, while carbon dioxide is consumed during the process and is not produced. Water, on the other hand, is used as a reactant and is also not produced as a result of photosynthesis.

Therefore, carbon dioxide does not fit into the category of products derived from photosynthesis, confirming it as the correct choice.