Leaf fall can be prevented by

$A$ : Cytokinin along with the auxin are required for morphogenesis.
$R$ : More cytokinin to auxin ratio promotes root initiation during micropropagation.

From your knowledge of physiology,can you think of some methods to increase the life span of cut plants in a vase?

What is the function of cytokinin?

$RNA$ formation is induced by

Which hormone is primarily associated with cell division?