Which natural event produces oxygen, which can then be used by humans and other organisms

Select the correct answer from each drop-down menu. during the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.

In this experiment, the was intentionally manipulated. it is the independent variable. the dependent variables that were measured were the

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