Differentiate between the nervous system and the hormonal system.

$(a)$ Define reflex arc. Draw a flow chart showing the sequence of events which occur during sneezing.
$(b)$ List four plant hormones. Write one function of each.

$(a)$ 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 two differences between the response of the plants and the response of the animals to stimuli.

What is the correct direction of flow of electrical impulses in a neuron?

What is the need for a system of control and coordination in an organism?