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Answer 1

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3. contraction of the protoplast of a plant cell as a result of loss of water from the cell. Plasmolysis is the process by which the cytoplasm of the cell gets shrinked due to the loss of water by osmosis. When a plasmolysed cell is places in water, the cell absorbs water from outside due to difference in solute concentration inside and outside the cell. By absorbing water the cell becomes turgid.

4. (i)

(a) Both are double membrane structures.

(b) Both of them have their own genetic material. (ii) Mitochondria is the site of production of energy whereas plastid is the site of production of food.