What do you say about the ray which is passing through the normal of a mirror ?

What do you know about inner ear?

What do you know about external ear?

What do you understand about the terms extinct

What do you know about arbor vitae?

What do you understand about the terms endangered

If the light ray is passing through the centre of curvature of a concave mirror, it doesn't deviate. Why ?

What do you understand about pure breeds ?

What can you say about the taking in and giving out of gases in plants ?

What do you know about pebble plant?

What do you think about the process of digestion?