Which of the following is responsible for apical dominance?

Which of the following is $NOT$ an effect of auxin?

Which of the following accelerates apical meristem and exerts direct effect on the growth of plant axis in length?

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

Water can be absorbed from a hypertonic external solution by

If the seedlings are grown in darkness,what is their physical appearance compared to those grown in light?