After some time, the tip of a plant that has been forced into a horizontal position grows upward. This phenomenon is related to
A)light.
B)whether the plant is in the northern or southern hemisphere.
C)gibberellin production by stems.
D)auxin production in roots.
E)auxin movement toward the lower side of the stem.

Question

Quizplus · Accepted Answer

This phenomenon is known as gravitropism or geotropism, and it is caused by the movement of auxins (a type of plant hormone) towards the lower side of the stem. This causes increased cell elongation and growth on the lower side, resulting in the upward curvature of the plant tip. Light, hemisphere, and gibberellin production do not directly affect gravitropism. While auxin production in roots can affect the overall growth and development of the plant, it is not specifically related to the phenomenon of a horizontal stem growing upward.

After Some Time, the Tip of a Plant That Has