Define antigen and antibody with a suitable example of each.

Give a suitable example for commensalism.

Write a brief account of the ball and socket joint, hinge joint and angular joint. Give suitable examples of each.

Explain Wurtz reaction with suitable example.

Explain cationic and anionic detergents with suitable examples.

Describe the tranqniIIizers with suitable examples

Discuss uses of dimensional equation with suitable examples.

Define narrow specutrum antibiotics with suitable examples.

What is a flower? Define the unisexual and bisexual giving one example of each.

Describe modifications of stem with suitable examples.