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Best Answer: yes, plants use oxygen at night... However, plants can't produce glucose, carbohydrates and oxygen without light. To get through the night, most plants reverse the process of photosynthesis and breathe, like you and I, by burning carbohydrates and oxygen while producing carbon dioxide and water.
Plants do breathe-they give out carbon dioxide and absorb oxygen from the air that surrounds them. Their tissues respire just as animal tissues do.