(a) List two differences between the movement of leaves of a sensitive plant and the movement of a shoot towards light.

(a)

Movement of Leaves of Sensitive plant	Movement of shoot towards light
It is not a growth related movement.	It is due to the growth in plant stem
Fast	Slow
Reversible response	Irreversible response
Non directional movement.	Directional movement.
Stimulus -touch	Stimulus -light

or any other OR

(b) At synapse the electrical signals are converted into chemicals, that can easily cross the gap and pass on to the next neurons, where it is again converted into electric signals. In this way the impulse is transmitted from one neuron to another.