What happens to ordinary plants (not c 4 or cam) when stomata close? enzymes change carbon dioxide to a four-carbon sugar. enzymes change carbon dioxide to glucose. photosynthesis stops due to a lack of carbon dioxide. photosynthesis stops due to a lack of water.

As humans plants also need oxygen to breathe they only take in carbon dioxide to do photosynthesis.So they wont do photosynthesis at night and so they only need to breathe. even though their stomata are closed at night some oxygen can go inside. and this is how plants breathe when their stomata are … Enzymes change carbon dioxide to glucose.

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