ANSWERS: 2
  • Plants use carbon dioxide and water to create glucose and oxygen, it's a waste product for plants. It doesn't use oxygen, not even during the night.
  • By this graph as an example, at 3 a.m. there's about 3 mg/L of oxygen in the plant and 7 at noon. So there'll be about twice as much Oxygen soon after noon than soon after midnight.

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