" 1.What are celestial bodies? Give examples."

What are celestial objects?

What are rigid bodies ? Give example.

What are macromolecules? Give examples.

What are vestigial organs ? Give two examples of vestigial organs in a human body.

What is perfect black body ? Give examples.

Define the terms deforming force, elasticity and plasticity. What are perfectly elastic and perfectly plastic bodies ? Give Examples.

What are hallucinogens? Give an example.

What are petides ? Give example ?