Describe the structure of diamond

(a) What is diamond ? Of what substance is diamond made? (b) Describe the structure of diamond . Draw a simple diagram to show the arrangement of carbon atoms in diamond. (c ) Explain why , diamond has a high melting point (d) State any tow uses of diamond.

Describe the structure of a seminiferous tubule.

Describe the structure of a seminiferrous tubule .

Describe the structure of cardiac muscle fibres.

Describe the structure of operon.