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प्रश्न
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?
उत्तर
(i) 1. Vacuole (containing cell sap)
2. Soil particles
3. Xylem vessel
4. Cortex cells
5. Vacuole in cortical cells
(ii) Root hair cell is unicellular
(iii) See diagram alongside.
(iv) Osmosis
(v) Osmotic pressure
(vi) This pressure is set up due to the difference in osmotic gradient.
APPEARS IN
संबंधित प्रश्न
the exact location of the Lenticels
What part is played by The cytoplasm in the uptake of water into the root hair?
Name the following:
Tissue concerned with upward conduction of water.
How is root hair structurally adapted for absorption of water from the soil?
Root hairs become flaccid, when fertilizers are added to the moist soil around it. Explain.
Given below is the diagram of a cell as seen under the microscope after having been placed in a solution:
(i) What is the technical term used for the state/condition of the cell given above?
(ii) Give the technical term for the solution in which the cell was placed.
(iii) Name the parts numbered 1 to 4.
(iv) Is the cell given above a plant cell or an animal cell ? Give two reasons in support of your answer as evident from the diagram.
(v) What would you do to bring this cell back to its original condition?
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:
Name the process by which intact plants lose water in the form of droplets.
Identify the part of the plants which is responsible for maximum absorption of water.
Why and how does water enter continuously into the root xylem?
