Apical dominance is stimulated by auxin,whereas it is inhibited by:

Delay of senescence or Richmond-Lang effect is a physiological effect of:

Zeatin has been obtained from

Guttman $(1957)$ found a quick increase in the amount of $RNA$ in the nuclei of onion root after:

Which of the following functions is/are not the function$(s)$ of cytokinin?
$I.$ New leaves formation
$II.$ Chloroplast formation in leaves
$III.$ Lateral shoot formation
$IV.$ Adventitious shoot formation
$V.$ Rooting on stem cuttings
Choose the correct option.

Discovery of which one of the following is connected with the use of an old sample of $DNA$ in a culture medium?