試題詳解

57. Photosynthesis ceases when leaves wilt, mainly because___________.
(A) the chlorophyll of wilting leaves breaks down
(B) flaccid mesophylI cells are incapable of photosynthesis
(C) stomata close, preventing CO₂ from entering the leaf
(D) photolysis. the water-splitting step of photosynthesis, cannot occur when there is a water deficiency
(E) accumulation of CO₂in the leaf inhibits enzymes