Fill in the blanks:
$(1)$ Maximum growth is observed in ........ phase.
$(2)$ Apical dominance is due to .......

Match the following concerning the activity function and the phytohormone involved.

Column $I$	Column $II$
$(a)$ Fruit ripener	$(i)$ Abscisic acid
$(b)$ Herbicide	$(ii)$ $2,4-D$
$(c)$ Bolting agent	$(iii)$ $GA_{3}$
$(d)$ Stress hormone	$(iv)$ Ethephon

Select the correct option from the following:

The physiologically active form of phytochrome is:

An annual plant differs from a biennial plant by ..........

The movement in the "Touch-me-not" plant $(Mimosa pudica)$ in response to touch is known as:

$I.$ Kinetin is a degradative substance from $DNA$.
$II.$ $ABA$ is present in all plants including lower plants.
$III.$ Low ratio of cytokinin to auxin favours root formation only.
$IV.$ $ABA$ is synthesized catabolically through glycolysis pathway.
Choose the correct combination of options.