The rapid closure of leaves of the Venus flytrap is now thought to be due to:
A) changes in turgor pressure in the cells beneath the epidermis.
B) changes in turgor pressure in the upper epidermis.
C) changes in turgor pressure in cells of the pulvinus.
D) acid-induced wall loosening of motor cells.
E) unloading of sucrose from the phloem.
Correct Answer:
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