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Why Is Photorespiration More Likely to Occur in Warm Weather

Question 21

Multiple Choice

Why is photorespiration more likely to occur in warm weather?


A) Plants require warm weather (at least 23°C) to drive photosynthesis.
B) Plants are more likely to close their stomata in the daytime heat than at night when it is cool.
C) Plants are more likely to dehydrate in warm weather, forcing them to close their stomata to conserve water; this prevents CO2 from entering the leaf.
D) The rubisco enzyme is very temperature-sensitive and becomes less selective in warmer temperatures, allowing it to fix O2 instead of CO2.

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