The positive phototropism shown by shoots is caused by the movement of:
a. Auxin to the shaded side of the shoot
b. Auxin to the lighted side of the shoot
c. Ethylene to the shaded side of the shoot
d. Ethylene to the lighted side of the shoot

Question

The positive phototropism shown by shoots is caused by the movement of: 
a. Auxin to the shaded side of the shoot
b. Auxin to the lighted side of the shoot
c. Ethylene to the shaded side of the shoot
d. Ethylene to the lighted side of the shoot

anonymous · Answer

(b) -> Auxins induce cell proliferation. when the cells grow on the dark side, the dark side will start receiving more light and and the auxins will move the other way.. keeping an equilibrium