Which statement about plant tropisms is true?
A) An imbalance in gibberellin concentration causes curvature.
B) Roots grow toward the light.
C) One side of the root or shoot grows more rapidly than the other.
D) DNA is the gravity receptor.
E) Auxin is the gravity receptor.

Question

Quizplus · Accepted Answer

One side of the root or shoot grows more rapidly than the other, causing the plant to curve or bend. This is due to differential growth rates of cells on one side of the plant relative to the other. Gibberellins are involved in stem elongation, but not necessarily in tropisms. Roots typically grow away from light, as they are negatively phototropic. DNA is not involved in tropisms, and auxin is the hormone responsible for gravitropism, not the gravity receptor itself.

Which Statement About Plant Tropisms Is True