$(a)$ Identify the phytohormone used by plants while performing the following functions:
$(i)$ Cell division in shoot tip.
$(ii)$ Inhibiting growth on approach of unfavourable conditions.
$(b)$ List in tabular form two differences between the movement in 'touch me not' plant and movement of shoot towards light.
$(i)$ Cell division in shoot tip.
$(ii)$ Inhibiting growth on approach of unfavourable conditions.
$(b)$ List in tabular form two differences between the movement in 'touch me not' plant and movement of shoot towards light.
(A) $(i)$ Auxin,
$(ii)$ Abscisic acid.
$(b)$
$(ii)$ Abscisic acid.
$(b)$
| Movement of shoot towards light (Tropism) | Movement in 'touch me not' plant (Nastic movement) |
| $(i)$ It is a slow response towards a stimulus. | $(i)$ It is an immediate response towards a stimulus. |
| $(ii)$ It is directional. | $(ii)$ It is non-directional. |
| $(iii)$ It is growth-dependent. | $(iii)$ It is growth-independent. |
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