Phytohormones are used in:

The pigment involved in photomorphogenetic movements is

The following statements are given about plant growth hormones:
$I.$ Cytokinins suppress the synthesis of chlorophyll.
$II.$ Auxins control apical dominance.
$III.$ Gibberellins promote shoot elongation.
$IV.$ Abscisic acid enables seeds to withstand desiccation.
Which of the above statements are correct?

$A$ sleep movement in plants is a nastic response that occurs daily in response to

Which of the following is not an extrinsic factor affecting plant growth?

Movement of a plant part in response to touch is known as: