Name any two glands which function as endocrine glands as well as exocrine glands.

Name two glands present in the skin whose increased activity causes pimples and acne.

What name is given to those sexual characteristic in humans:

(a) which are present in babies at birth?

(b) which develop in mature boys and girls?

What is the other name of ductless glands?

What term is used for the secretion of endocrine glands?