Which of the following induces cell division in a cell?

Explain the plant hormone discovered from the sperm of herring fish.

Several horticultural techniques are followed for the production of 'bonsai' plants. One of them is the drastic pruning of the root system. Which of the following physiological factors is involved in that method?

Which hormone is responsible for delaying leaf senescence by promoting chlorophyll retention?

$A$: Cytokinins are anti-ageing hormones.
$R$: They cause changes in osmotic potential by increasing the volume of mature cells.

Senescence is inhibited by