Why is the use of iodised salt advisable?

Give the function$(s)$ of the following plant hormones:
$(i)$ Auxins $(ii)$ Gibberellins $(iii)$ Cytokinins $(iv)$ Abscisic acid $(v)$ Ethylene

Answer the following:
$(i)$ Name the endocrine gland associated with the brain.
$(ii)$ Which gland secretes digestive enzymes as well as hormones?
$(iii)$ Name the endocrine gland associated with the kidneys.
$(iv)$ Which endocrine gland is present in males but not in females?
$(v)$ Which hormone is responsible for changes in females during puberty?
$(vi)$ Iodine is necessary for the synthesis of which hormone?

How is the timing and the amount of hormone secreted by a gland regulated? Explain with an example.

Which gland produces the hormone thyroxine?

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?