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प्रश्न
The alongside diagram A shows a root hair growing through the soil particles. Diagram B is the root hair of an aquatic plant.
(i) Name the parts 1,2,3.
(ii) Name two substances which enter the root hair. What are their uses?
(iii) By what process do these substances enter the root hair?
(iv) Account for the different shapes of root hairs in the two diagrams.
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उत्तर
(i) 1-Nucleus. 2-Cell wall. 3-Cytoplasm of the root hair cell.
(ii) 1. Water: Carries minerals to the plant.
2. Minerals: They are needed for healthy plant growth.
(iii) Osmosis.
(iv) In the Fig. A, the root hair has to pass through the soil particles, and as such, they are not straight. In the Fig. B, the root hair has no obstruction in water, and as such it grows straight.
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संबंधित प्रश्न
Correct the following statement by changing the underlined word.
Xylem transports starch from the leaves to all parts of the plant body.
How does movement and absorption of water take place through the roots?
Name the following:
The process by which water enters root hairs.
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 |
Choose the correct answer:
An example of a selective permeable membrane is __________
Multiple Choice Question:
Process of endosmosis stops:
Write a note on the morphological structure of the root.
Trace the pathway followed by water molecules from the time it enters a plant root to the time it escapes into the atmosphere from a leaf.
Identify the zone in wbkh root hair occurs.
