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A thin strip of epidermal cells from the fleshy scales of an onion bulb was examined in a drop of water, under a microscope. All the epidermal cells looked alike and the figure alongside represents one of them. The thin strip was then transferred to a drop of strong sugar solution and re-examined under the microscope after about five minutes.
(i) Make a sketch of one of the epidermal cells, as it might appear after immersion in a strong sugar solution. Label any two parts which have undergone a change.
(ii) Give the scientific term for the change shown in Q.(i) above.
(iii) What would you do to bring this cell back to its original condition?
(iv) Give the scientific term used for the recovery of the cell as a result of the step taken in Q.(iii) above.
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Given below is an experimental demonstration.
(i) Which phenomenon has been demonstrated in the given figure?
(ii) What is the solute and what is solvent in the above experiment?
(iii) Define the phenomenon in Q. (i) above.
(iv) Give one example from your daily life experiences based on this principle.
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Give Technical Term for the following.
Phenomenon of absorption of water by surface attraction.
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Name the following:
Water is absorbed from the soil by which part.
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Name the following:
The kind of cells that constitute the cortex of a root.
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Name the following:
Root hairs are the extension of which cells.
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Give Technical Term for the following.
Tissue which transports manufactured food from leaves to other parts of the plant.
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Give Technical Term for the following.
The tissue responsible for the ascent of sap in plants.
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Name the following:
The solution outside the cell having lower solute concentration than the fluids.
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Name the following:
Name the process by which intact plants lose water in the form of droplets.
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Fill in the Blank
Leaves get wilted if _________ is removed from the plant.
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Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Xylem is the water-conducting tissue in plants.
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Column ‘II’ is a list of items related to ideas in Column ‘I’. Match the term in Column ‘II’ with a suitable idea given in Column ‘I’.
| Column I | Column II |
| (i) Diffusion | (a) The exit or flow of water from the cell to the outer environment. |
| (ii) Xylem | (b) The shrinkage of protoplasm when the cell is kept in a hypertonic solution. |
| (iii) Root pressure | (c) The tissue through which water and mineral salts move upward in a plant. |
| (iv) Isotonic solution | (d) Two solutions which have equal osmotic pressure. |
| (v) Exosmosis | (e) The process by which the molecules of perfume spread in the room when the bottle is open. |
| (vi) Osmosis | (f) The process by which roots absorb water from the soil. |
| (vii) Plasmolysis | (g) The pressure by which water rises up to some feet in a lofty tree. |
| (viii) Hypotonic solution | (h) The concentration of the solution when lower than that of the cell sap. |
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Multiple Choice Question:
Process of endosmosis stops:
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Multiple Choice Question:
Water will be absorbed by the root hairs when:
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What are the basic requirements of photosynthesis?
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Name the membrane that connects thylakoid of one granum With the other granum.
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What do you mean by endocrine system?
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What are endocrine glands?
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