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Photosynthesis in Higher Plants — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYPhotosynthesis in Higher Plants1 Mark
Question
Oxygen evolved during photosynthesis comes from $H _2 O$ or $CO _2$?
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Answer

Oxygen in photosynthesis evolves from $H _2 O$ (i.e., by splitting of water) during light reaction.

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