Draw a diagram showing structure HIV virus.

Draw a diagram showing structure of a flower.

Draw a diagram showing structure of chloroplast.

Draw a well labelled diagram showing structure of L.S. of Maize grain.

Draw a labelled diagram showing course of rays for a simple microscope or magnifying glass.

Draw a diagram of the structure of a human ovum surrounded by corona radiata. Label the following parts: Ovum Plasma Membrane Zona Pellucida.

When a ray of light passes through a glass prism then a spectrum is obtained on the screen Draw a diagram showing a spectrum of white light.

Draw a well labelled diagram showing the structure of atypical Angiospermic Embryo sac.