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Which substance is a product of photosynthesis

User Omiel
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They use it to react carbon dioxide with water to make a sugar called glucose. The glucose is used in respiration, or converted into starch and stored. Oxygen is produced as a by-product. This process is called photosynthesis.
User MonkeyBlue
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Answer: Oxygen

Step-by-step explanation:

User Hendry Lim
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