The hormone which increases fertility in males is called:

Dramatic changes of body features associated with puberty are mainly because of the secretion of:

Differentiate between estrogen and testosterone.

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?

State whether the following statement is true or false: Abscisic acid inhibits growth.

"Nervous and hormonal systems together perform the function of control and coordination in human beings." Justify the statement.