Perishable vegetables can be maintained fresh for a longer period by spraying them with a solution of

Induction of cell division and delay in senescence is done by

Study the following statements:
$I.$ Cytokinins are formed primarily in roots.
$II.$ Auxin and cytokinin are antagonistic in apical dominance.
$III.$ Kinetin (a modified $DNA$ purine) was discovered from herring sperm.
$IV.$ Zeatin is auxin.
$V.$ Zeatin was firstly extracted from herring.
Choose the incorrect one.

Which of the following causes delaying of senescence?

Define/Explain: Cytokinins.

What is the function of cytokinin?