Auxins inhibit the growth of

$A$ : Auxin treatment causes acidification of the cell wall and helps in cell elongation.
$R$ : Loosening of cell wall microfibrils occurs.

Which of the following movements in plants is due to the increased concentration of $Auxin$?

Identify the functions of auxin and choose the correct option.
$I.$ Initiate rooting in stem cuttings
$II.$ Promote flowering in pineapples
$III.$ Controls xylem differentiation

To induce flowering in Litchi and Pineapple,which hormones are used for foliar spray?

Phototropic curvature is the result of an uneven distribution of which of the following?