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Photosynthesis and Respiration — BIOLOGY STD 7 — Question

ICSE BoardEnglish MediumSTD 7BIOLOGYPhotosynthesis and Respiration2 Marks
Question
Do plants need oxygen? If so, what is its source?
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Answer

Yes, plants need oxygen, all the free oxygen in the atmospheric air is the result of photosynthesis. No animal can survive without oxygen as it is needed for respiration. Even the plants use the same oxygen in dark for their own respiration.

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