Which metabolic shift occurs when a plant adapted to C3 photosynthesis encounters a hot, dry environment,limiting rubisco?

💡 Explanation

When C3 plants encounter a hot, dry environment, stomatal closure to conserve water inhibits CO2 entry and oxygenates rubisco, leading to photorespiration. Therefore photorespiration exceeds photosynthesis, rather than activating RuBP, because increased oxygen levels favor the oxygenase activity. Stomata closing, not opening, is a key feature.

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