Charles and Francis Darwin concluded from their experiments on phototropism by grass seedlings that the part of the seedling that detects the direction of light is the
A) tip of the coleoptile.
B) part of the coleoptile that bends during the response.
C) base of the coleoptile.
D) cotyledon.
E) phytochrome in the leaves.

Question

Quizplus · Accepted Answer

Charles and Francis Darwin's experiments on phototropism demonstrated that the tip of the coleoptile is the part of the seedling that detects the direction of light.

Charles and Francis Darwin Concluded from Their Experiments on Phototropism