Draw a simple diagram showing a food chain.

Draw a diagram showing the first and third harmonics produced in a closed pipe.

Draw the ray diagram showing the formation of image by a compound microscope.

Draw a Schematic diagram showing the circulation of blood in man, starting from left ventricle of heart and ending in the right auricle. Name the type of circulation

What is food chain?

Draw the energy level diagram showing how the spectrallines corresponding to Balmer series occur due to transition between the energy levels.

The Image formed by a thin lens is shown in the figure. Draw the ray diagram showing above lens forming a magnified erect, virtual image