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प्रश्न
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उत्तर
The root hairs become flaccid when fertilisers are added to the moist soil around them because fertilisers with moist soil become hypertonic which causes plasmolysis in the cells of the root hair. The turgidity is lost and the cell becomes flaccid.
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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 |
Study the experimental setup in the figure and then answer the question that follow.
What is meant by 'semipermeable membrane'?
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.
Multiple Choice Question:
Water will be absorbed by the root hairs when:
In the zone of absorption, epidermal cells form unicellular hair-like extensions called ________.
Write a note on the morphological structure of the root.
Minerals cannot be passively absorbed by the roots.
Which part of the root helps in maximum absorption of water and minerals?
Water in the root enters due to ______.
Give other name of epidermal cells in roots of plants.
