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प्रश्न
Explain why:
Raisins swell up in water.
उत्तर
The raisins swell up when placed in water because the water is hypotonic as compared to the raisins so the water enters inside the raisins as a result of endosmosis.
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संबंधित प्रश्न
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 |
What part is played by The cytoplasm in the uptake of water into the root hair?
Choose the correct answer:
An example of a selective permeable membrane is __________
Choose the correct answer:
Meaning of ascent of sap is ____________
The figure given below is a diagrammatic representation of a part of the cross-section of the root in the root hair zone. Study the same and then answer the questions that follow :
(i) Name the parts indicated by guidelines ‘1’ to ‘5’
(ii) Is the root hair cell unicellular or multi-cellular?
(iii) Draw a labeled diagram of the root hair cell as it would appear if some fertilizer is added to the soil close to it.
(iv) Name the process responsible for the entry of water molecules from the soil into A1 and then A2.
(v) What pressure is responsible for the movement of water in the direction indicated by arrows?
(vi) How is this pressure set up?
In the zone of absorption, epidermal cells form unicellular hair-like extensions called ________.
What is the composition of inner layer of root hair?
Water which is absorbed by roots is transported to aerial parts of the plant through ______
The tubular, colorless delicate prolongations of epidennal cells are seen in which region of root in plants?
