Who observed that the coleoptiles of canary grass responded to unilateral illumination by growing towards the light (phototropism)? 

Who performed the experiments using canary grass to demonstrate the curvature of tip?

Who performed the experiments using canary grass to demonstrate the curvature of tip?

Unilateral growth and curvature of canary grass was done by

Who first observed phototropic curvature of plants?

Who observed that stomata open in light and close in night?

Who did observe that stomata open in light and close in the night:

Read the given statements and select the correct option. (i) Darwin and Darwin (1880) found that sensation of unilateral illumination was perceived by the coleoptile tip of canary grass. (ii) IA A is universal natural auxin, discovered by Kogl et al. (iii) IBA is both natural and synthetic auxin. (iv) Auxins promote the growth of lateral shoots.