Question

which of these is considered to be a waste product (something that is produced) of photosynthesis?
sunlight
oxygen
water

Explanation:

Photosynthesis is the process by which plants use sunlight, carbon dioxide, and water to produce glucose (a sugar) and oxygen. Sunlight is an input (energy source) for the process, not a product. Water is also an input (along with carbon dioxide). The chemical equation for photosynthesis is \(6CO_2 + 6H_2O+ \text{sunlight}
ightarrow C_6H_{12}O_6+6O_2\). Here, oxygen (\(O_2\)) is clearly a by - product (waste product in the sense that plants don't use it for the photosynthetic process itself but release it into the atmosphere).

Answer:

B. Oxygen