According to modern ideas about phototropism in plants,
A)light causes auxin to accumulate on the shaded side of a plant stem.
B)auxin stimulates elongation of plant stem cells.
C)auxin is produced by the tip of the coleoptile and moves downward.
D)A and B only
E)A, B and C

Question

Quizplus · Accepted Answer

Phototropism involves the accumulation of auxin on the shaded side of the plant, stimulating cell elongation, and auxin is produced at the tip and moves downward.

According to Modern Ideas About Phototropism in Plants