Question

how are cellular respiration and photosynthesis related in terms of their products and reactants?
they are unrelated processes that occur in different organisms
they both produce oxygen as their main product
they are opposite processes - the products of photosynthesis are the reactants for cellular respiration, and vice versa
they both require sunlight to function properly

Explanation:

Photosynthesis uses carbon dioxide (\(CO_2\)) and water (\(H_2O\)) to produce glucose (\(C_6H_{12}O_6\)) and oxygen (\(O_2\)) in the presence of sunlight. Cellular respiration uses glucose (\(C_6H_{12}O_6\)) and oxygen (\(O_2\)) to produce carbon dioxide (\(CO_2\)) and water (\(H_2O\)). So, the products of one are the reactants of the other.

Answer:

They are opposite processes - the products of photosynthesis are the reactants for cellular respiration, and vice versa.