Bending of stem towards light 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.

Read the following statements on plant growth and development.
$A.$ Parthenocarpy can be induced by auxins.
$B.$ Plant growth regulators can be involved in promotion as well as inhibition of growth.
$C.$ Dedifferentiation is a pre-requisite for redifferentiation.
$D.$ Abscisic acid is a plant growth promoter.
$E.$ Apical dominance promotes the growth of lateral buds.
Choose the option with all correct statements.

Rhizocaline is an additional hormonal substance which is secreted by:

Distinguish between the functions of Ethylene and Abscisic Acid $(ABA)$ from the given statements:
$I -$ Induces closure of stomata.
$II -$ Initiates flowering in pineapple.
$III -$ Initiates germination in peanut seeds.
$IV -$ Synthesized in large amounts by ripening fruits.
$V -$ Plays an important role in seed development,maturation,and dormancy.
Identify the correct sequence for Ethylene and Abscisic Acid respectively.

The coiling of tendrils or leaf tendrils is caused by: