試題詳解

19. The following steps occur during a plant's response to drought stress.
I) ABA accumulates in the leaves 
II) stomata close
III) transpiration decreases
IV) guard cell potassium channels open
Which of the following places the steps in the correct sequence to represent the acquisition of drought
tolerance in the plant?
(A) I, II. Ill, and IV
(B) I, IV, II, and 111
(C) II, I, III. and IV
(D) IV, I, II, and III