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Question
What would happen to the root hair of a potted plant if the soil was watered with an extremely concentrated solution of sodium chloride?
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Solution
If the soil was watered with extremely concentrated solution of sodium chloride, the water will move out from the root hair due to osmosis and thus, plasmolysis will take place.
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RELATED QUESTIONS
Draw a magnified view of the root-hair, and describe, how it helps in the absorption of water from the soil.
Choose the correct answer:
Swelling of wooden doors during rains is caused by ___________
The diagram below represents a layer of epidermal cells showing a fully grown root hair. Study the diagram and answer the questions that follow:
Mention one distinct difference between the parts labelled A and B.
Draw a diagram of the root hair cell as it would appear when a concentrated solution of fertilizers is added near it.
Name the following:
The kind of cells that constitute the cortex of a root.
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. |
Multiple Choice Question:
In soil, water available for absorption by root is ______.
What is the composition of inner layer of root hair?
The tubular, colorless delicate prolongations of epidennal cells are seen in which region of root in plants?
