Roots Grow Downward and Shoots Grow Upward Due To

Question

Roots grow downward and shoots grow upward due to
A) auxin.
B) cytokinin.
C) ethylene.
D) gibberellin.
E) abscisic acid.

Accepted Answer

Auxin is a plant hormone that plays a crucial role in the growth direction of roots and shoots by promoting cell elongation. It accumulates on the lower side of the plant, causing roots to grow downward (positive gravitropism) and shoots to grow upward (negative gravitropism).