Which risk increases when persistent drought limits water availability in C4 plants?

💡 Explanation

When drought limits water, C4 plants close stomata to prevent water loss, which reduces CO2 intake. Therefore photorespiration increases because RuBisCO binds more readily to O2 under low CO2 concentrations, thereby slowing the photosynthetic rate, rather than nitrogen fixation, chlorophyll synthesis, or vascular erosion which rely on independent processes.

• Which thermoregulatory consequence arises when a mammal's skin temperature drops substantially in frigid conditions?
• Which constraint complicates efficient C4 photosynthesis in prolonged drought?
• Which consequence results when vasodilation is suppressed during hibernation?
• Which outcome results when the gut microbiome in termites lacks flagellated protists?
• Which communication failure results when fireflies' habitat light pollution?
• Which outcome results from a prolonged shivering response in small mammals exposed to extreme cold?