What is the movement of a plant towards gravity called?

What is the correct direction of flow of electrical impulses?

$(a)$ 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.

Why is the flow of signals in a synapse from the axonal end of one neuron to the dendritic end of another neuron,but not in the reverse direction?

What constitutes the central and peripheral nervous systems? How are the components of the central nervous system protected?

Which hormone from the pituitary gland stimulates the reabsorption of water and regulates water loss through urine?