The diagram given below represents an experimental set-up to demonstrate a certain process. Study the same and answer the questions that follow:



(a) Name the process.
(b) Define the above-named process.
​(c) What would you observe in the experimental set-up after an hour or so?
(d) What control experiment can be set up for comparison?
​(e) Keeping in mind the root-hair, cell and its surroundings, name the parts that correspond to (1) concentrated sugar solution (2) parchment paper and (3) water in the beaker.
​(f) Name any other substance that can be used instead of parchment paper in the above experiment.
​(g) Mention any two advantages of the process to the plants.

Dear Student,

Answers for the asked questions are as follows-

(a) Osmosis.
(b) Osmosis is the movement of solvent (water) from its higher concentration to its lower concentration i.e., from region having lower concentration of solute to region of higher concentration of solute. Osmosis takes place through Semi-permeable memberane..
(c) After an hour or so, the level of sugar solution in the thistle funnel will rise due to osmosis and the level of water in the beaker will drop slightly.
(d) To set a control for this experiment, the same setup should be taken with normal water filled in both beaker and the thistle funnel with the cellophane memberane instead of parchment paper and inverted in the beaker.
(e) (i) Concentrated sugar solution: Cytoplasm of the root hair cell.
(ii) Parchment paper: Cell membrane i.e., the semi-permeable membrane.
(iii) Water in the beaker: water in the soil.
(f) Cellophane membrane can be used instead of Parchment paper.
(g) Advantages of osmosis are- 
​​​​​​  (Ⅰ) It controls the turgidity of the cells.
 (Ⅱ) It helps in transfer of water from one cell to another.

Hope it helps you!
Regards.
 

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