Involuntary actions in the body are controlled by:

Give one example of chemotropism.

'Brain and spinal cord are two vital organs of our body'. How is our body designed to protect them?

Select the mismatched pair:

Name the plant hormone responsible for the promotion of cell division.

Give a reason to explain why:
$(i)$ Adrenaline helps in dealing with emergency situations?
$(ii)$ Secretions of growth hormone should be specific in the human body?
$(iii)$ Some patients of diabetes are treated by giving injections of insulin?