The abscission layer is covered by a leaf scar which is composed of

Coiling of garden pea tendrils around any support is an example of

Polyploidy can be induced by the application of

Read the following statements regarding $\text{PGRs}$:
$A.$ Ethylene also promotes root growth and root hair formation.
$B.$ Natural cytokinins are synthesized in regions where rapid cell division occurs.
$C.$ $2,4-D$,widely used to kill monocotyledonous weeds,does not affect mature dicotyledonous plants.

Analogy type question:
$(1)$ Initial growth : Lag phase :: Rapid growth : .........
$(2)$ $IAA$ : Indole compounds :: Abscisic acid : .......

The movement in the leaf lobes of $Dionaea$ (Venus flytrap) is due to: