The movement of leaves in $Mimosa$ $pudica$ is due to:

Seed germination requires:
$I$. Light
$II$. Suitable temperature
$III$. Moisture
$IV$. Oxygen
Select the correct option.

If the $Corpora \text{ } allata$ is removed from an insect nymph, what will happen?

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.

Which one of the following pairs is not correctly matched?

List five main groups of natural plant growth regulators. Write a note on discovery,physiological functions and agricultural/horticultural applications of any one of them.