Name the time period in one’s life when the brain has the greatest capacity for learning.

What is the common name of the bulge (or projection) at the front of throat in grown up boys?

What substance is secreted by sebaceous 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?