Which statement is accurate about how C₄ plants are able to survive hot,dry spells during the growing season? A)When the stomata close during heat stress,RuBP carboxylase is not exposed to the increase in oxygen concentration experienced in the leaf.This allows the plant to avoid photorespiration. B)When the stomata close during heat stress,RuBP carboxylase is exposed to the increase in oxygen concentration experienced in the leaf.This allows the plant to avoid photorespiration. C)When the stomata open during heat stress,RuBP carboxylase is not exposed to the increase in oxygen concentration experienced in the leaf.This allows the plant to avoid photorespiration. D)When the stomata close during heat stress,RuBP carboxylase is exposed to the increase in oxygen concentration experienced in the leaf.This allows the plant to undergo photorespiration. E)When the stomata open during heat stress,RuBP carboxylase is not exposed to the increase in oxygen concentration experienced in the leaf.This allows the plant to undergo photorespiration.

Question

Quizplus · Accepted Answer

During hot, dry spells, plants close their stomata to prevent water loss through transpiration. This also means that less CO2 can enter the leaf for photosynthesis, leading to an increase in oxygen concentration. If the enzyme RuBP carboxylase is exposed to this increase in oxygen, it can undergo photorespiration, which can be detrimental to the plant. By closing the stomata, the plant avoids photorespiration because the RuBP carboxylase is not exposed to the increased oxygen concentration.

Which Statement Is Accurate About How C4 Plants Are Able

Which Statement Is Accurate About How C₄ Plants Are Able