Work by Charles Darwin and Francis Darwin was instrumental in the discovery of ____.
A) auxins
B) brassinosteroids
C) jasmonates
D) cytokinins
E) gibberellins

Question

Quizplus · Accepted Answer

Charles Darwin and his son Francis Darwin conducted experiments on phototropism, the process by which plants grow toward light, which led to the discovery of auxins, the first class of plant hormones identified. Their work, particularly on the bending of seedlings, was foundational in understanding how plants respond to light, indicating the role of a signal (later identified as auxins) in the tip of the plant that promotes growth on the shaded side, causing the plant to bend toward the light.

Work by Charles Darwin and Francis Darwin Was Instrumental in the Discovery