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Oxygen is not needed in photosynthesis. In fact it is produced by photosymthesis and eliminated from the plant as a waste product.

Plants of course do need some oxygen for the same reason that we do. They use oxygen in respiration - the process in which food is 'burned' to release energy. However photosynthesis produces more oxygen than the plant uses up in respiration, so the excess isremovedfrom the plant into the atmosphere.

For a very simple introduction to photosynthesis see http://www.bbc.co.uk/schools/ks3bitesize/science/biology/green_plants_1.shtml

For more detail see http://www.biology4kids.com/files/plants_photosynthesis.html

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What are the substance needed for photosynthesis what substance are produced during photosynthesis and?

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Oxygen and glucose is not needed for photosynthesis. Technically, water is needed only to keep the plant alive but, like oxygen and glucose, it does not play a role in photosynthesis. Sunlight IS needed, and chlorophyll must be present to absorb the sunlight.


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Two gasses needed for photosynthesis?

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