Question

The following diagrams shows four coleoptile set up at the start of an experiment-
Which two coleoptiles will both bend towards the light source?

• A. 1 and 2
• B. 1 and4
• C. 2 and 3
• D. 3 and 4

Answer 1

The correct option is A 1 and 2

In the coleoptile experiment, if light is shown on a coleoptile, it starts bending from one side towards light. The bending occurs due to elongation of the part just below the coleoptile, some influence is transmitted from tip to basal region which results in curvature.

Thus, the correct answer is '1 and 2.'