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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.
They photosynthesise to produce glucose, and then respire to convert that glucose into energy. During the day, plants give out more oxygen, and during the night, plants give out more carbon dioxide. Plants have two types of respiration arobic and anerobic. Plants do not breathe like humans, although they respire. This is when they absorb oxygen from the air around them and in return, release Carbon Dioxide. This is different from photosynthesis where they release oxygen and take in carbon dioxide.