Draw a neat labelled diagram of a nucleotide.

Explain the process of Phagocytosis.

The need to limit the size of the family is more vital today than ever before. Give two reasons.

The picture given below shows the athletes lined up at the starting line. The countdown begins and all are focused and alert waiting for the gunshot.

(a) Which hormone prepares the body in such a situation given above?

(b) Name the endocrine gland that secretes the hormone mentioned in (a).