How does chemical coordination take place in animals?

$(a)$ 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.

Write true or false for the statement: Forebrain maintains posture and balance of the body.

What are the major parts of the brain? Mention the functions of different parts.

State the function of: $(i)$ gustatory receptors,and $(ii)$ olfactory receptors.

Describe an activity to illustrate the phenomenon of phototropism and explain why this occurs.