The substance that triggers the fall of mature leaves and fruits from plants is due to

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?

Which part of the brain regulates and controls involuntary actions?

Which statement is not true about thyroxine?

$(i)$ Differentiate between sensory neurons and motor neurons.
$(ii)$ How is the brain protected in our body?
$(iii)$ Name the part of the brain responsible for the precision of voluntary actions and maintaining body posture and balance of the body.

Which hormone acts as a growth inhibitor in plants?