. Give a suitable word for each of the following statements
(a) The site which responds to a hormone.
(b) Name of a gland which transports secretions through ducts.
(c) Chemicals which control changes at adolescence stage.
(d) It marks the beginning of reproductive period.
Ans. (a) Target site
(b) Sweat glands/salivary glands/oil glands (any one)