試題詳解

3. The rapid clos of leaves of the Venu flytrap is now thought to be due to:
(A)changes in turgor pressure in the mesophyll cells underlying the epidermis.
(B)changes in turgor pressure in the upper epidermis.
(C) changes in turgor press sure in cells of the pulvinus.
(D)acid-induced wall loosening of motor cells.
(E) Unloading of sucrose from the phloem.