If a potted plant is kept horizontally for a few days,in which direction does the tender stem of the plant grow?

Which mechanism controls the timing and amount of hormone released?

Label the parts $(a)$,$(b)$,$(c)$ and $(d)$ and show the direction of flow of electrical signals in the figure.

Which of the following statements are true about the brain?
$(i)$ The main thinking part of the brain is the hindbrain.
$(ii)$ Centres of hearing,smell,memory,sight,etc.,are located in the forebrain.
$(iii)$ Involuntary actions like salivation,vomiting,and blood pressure are controlled by the medulla in the hindbrain.
$(iv)$ The cerebellum does not control posture and balance of the body.

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

Label the parts of a neuron in the given figure.