The chief role of cytokinin is

Which plant hormone is basic in nature?

Which of the following exerts the Richmond-Lang effect,i.e.,prevents the loss of chlorophyll?

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.

In plants,which hormone induces $RNA$ synthesis?

Differentiation of shoot is controlled by