A) Lamarck and Boysen-Jennsen
B) Boysen-Jennsen and Darwin
C) Darwin and Lamarck
D) de Vries and Paul
Correct Answer: B
Solution :
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.
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