Which outcome occurs when a C4 plant experiences prolonged drought conditions affecting phosphoenolpyruvate carboxylase regulation?

💡 Explanation

When C4 plants experience drought, phosphoenolpyruvate carboxylase regulation is disrupted because reduced water availability impacts enzyme functionality, leading to decreased carbon fixation efficiency. Therefore, photorespiration increases, rather than CAM shift which requires genetic predisposition, chloroplast rupture which is unrelated, or biomass increase which is a long-term adaptation.

• Which effect results when soil microbes in a nitrogen-poor environment consume available carbon?
• Which risk occurs if nectar sources shift during waggle dance?
• Which reproductive consequence results when brood parasite birds employ mimicry?
• Which impact results when elevated atmospheric carbon dioxide causes partial stomatal closure in plants?
• Which risk increases for hibernating mammals during interbout arousal with disrupted vasodilation?
• Which consequence results when a forager bee imperfectly copies a waggle?