Classical experiments on growth were performed by

Options

(a) Lamarck and Boysen-Jennsen
(b) Boysen-Jennsen and Darwin
(c) Darwin and Lamarck
(d) De Vries and Paul

Correct Answer:

Boysen-Jennsen and Darwin

Explanation:

The existence of first plant growth hormone came from the work of Darwin and Darwin. They found that bending movement of coleoptile of canary grass was due to exposure of tip to unilateral light. Boysen-Jenson found that the tip produces a chemical which was later named auxin.