Which substances are the products of photosynthesis?

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy, primarily in the form of glucose. During this process, carbon dioxide and water, in the presence of sunlight and chlorophyll, are transformed into glucose (a sugar) and oxygen.

The correct answer, which identifies oxygen and glucose as the products, highlights the two key outcomes of photosynthesis. Oxygen is released as a byproduct, while glucose serves as an energy source for the plant and can be utilized for growth and cellular respiration.

Other choices present substances that are either reactants or outputs not directly related to photosynthesis. Water and carbon dioxide are the raw materials needed to initiate the process. Glucose and starch, while related since glucose can be converted into starch for storage, do not reflect the immediate products of photosynthesis, as starch is formed from glucose later. ATP, which stands for adenosine triphosphate, is involved in energy transfer within cells but is not directly a product of photosynthesis; rather, it is an intermediary energy carrier used in various cellular processes.