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प्रश्न
What part is played by the cell wall?
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उत्तर
Cell wall separates the two solutions - cell sap and soil solution and is permeable which means it allows the water to enter inside the root hair cells by endosmosis.
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संबंधित प्रश्न
The phenomenon of loss of water through a cut stem or injured part of plant is called ___________.
How does movement and absorption of water take place through the roots?
Match the items in column I with those in column II
| Column I | Column II | ||
| (a) | Xylem | (i) | semi - permeable |
| (b) | Phloem | (ii) | permeable |
| (c) | Cell membrane | (iii) | downward flow of sap |
| (d) | Root pressure | (iv) | upward flow of water |
| (e) | Cell wall | (v) | guttation |
Concentration of mineral nutrient elements is higher inside the root hairs than in the surrounding soil. How do roots take them in from the soil?
Three plants (a), (b) and (c) were placed in beakers containing coloured water. The water in each beaker was covered with a layer of oil. The leaves were removed from plant (b), while plant (c) was exposed to strong light.
(i) In which plant, (a), (b) or (c) would the water move up the fastest?
(ii) In which plant (a), (b) or (c), would the water move up slowly?
(iii) Why was the water covered with a layer of oil?
(iv) What is being investigated by this experiment?
The diagram below represents a layer of epidermal cells showing a fully grown root hair. Study the diagram and answer the questions that follow:
Draw a diagram of the above root hair cell as it would appear when a concentrated solution of fertilizers is added near it.
Study the experimental setup in the figure and then answer the question that follow.
What is meant by 'semipermeable membrane'?
Multiple Choice Question:
In soil, water available for absorption by root is ______.
Draw a neat and proportionate diagram of root hair and label mitochondria, nucleus and vacuole.
Water in the root enters due to ______.
