Question

The process shown in the given figure occurs in which of the following cases?



(i) Absorption of water by plant roots
(ii) Aroma of flowers spreads in the air
(iii) Swelling of raisins when kept in water
(iv) Exchange of gases in plants and animals

• A. (i), (iii) and (iv)
• B. (ii) and (iii) only
• C. (i) and (iii) only
• D. (ii) and (iv) only

Answer 1

The correct option is C (i) and (iii) only

The process shown in the figure is osmosis, in which water moves from its higher concentration to its lower concentration through a semi-permeable membrane.

• Absorption of water by plant roots occur through osmosis, where water moves from soil to the root hair cells through membrane of root hair cells.
• Aroma of flower spreads in the air through simple diffusion where no membrane is present in the air.
• Swelling of raisins when kept in water also occurs through osmosis via membrane of raisins.
• Exchange of gases in plants and animals occurs through simple diffusion as there is no role of membrane in this case.