Define imbibition. State its significance .

What is excretion. State its significance.

What do you mean by Stair step diagonal? State its significance.

Define ortet rule. Write its significance and limitations.

Define food web. Give its significance.

What is accomodation? Write its significance.

Derive de-Broglie’s equation. What is its significance?

Define ionisation potential. State its change down a group.

Describe the process of meiosis. What is its significance in sexually reproducing organism .

What is meant by double circulation? What is its significance?

Define vital capacity. What is its significance?