Question

5 which of the following is a waste product of photosynthesis?
methane
water
oxygen
carbon dioxide
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Explanation:

During photosynthesis, plants use carbon - dioxide and water in the presence of sunlight to produce glucose and oxygen. Oxygen is released into the atmosphere as a by - product or waste product of this process. Methane is not a product of photosynthesis. Water is a reactant in photosynthesis, and carbon dioxide is also a reactant.

Answer:

Oxygen