Question

which harmonise is responsible for phototropisim​

Answer 1

Answer:

Auxin is Responsible for phototropism.

Explanation:

Auxin moves to the darker side of the plant, causing the cells there to grow larger than corresponding cells on the lighter side of the plant. This produces a curving of the plant stem tip toward the light, a plant movement known as phototropism. Auxin also plays a role in maintaining apical dominance.