NEET 2010 Biology question

Phototropic curvature is the result of uneven distribution of

(1)Phytochrome
(2)Cytokinins
(3)AuxinCorrect
(4)Gibberellin

Answer: (3)

Solution

In phototropism, the shoot bends towards unilateral light because auxin (IAA) moves to the shaded side, so the shaded side has a higher auxin concentration, which stimulates greater cell elongation there. This uneven distribution of auxin

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-090612