Which of the following growth regulators is an adenine derivative?

Which one of the following is $NOT$ a function of cytokinins?

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 is a coconut milk factor?

$A$ hormone delaying senescence is

Shoot differentiation is controlled by which of the following?