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प्रश्न
Give two examples of turgor movements in plants.
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उत्तर
Examples of turgor movements in plants:
- The rapid drooping of the leaves of the sensitive plant (Mimosa pudica) is an outstanding example of turgor movement.
- If one of the leaves is touched, even lightly, the leaflets fold up, and within 2 to 3 seconds, the entire leaf droops. If the leaf is touched somewhat strongly, the wave of folding and drooping spreads from the stimulated leaf to all neighbouring leaves.
- Slowly, the leaves recover and again stand erect. In this plant, the stimulus of touch leads to loss of turgor at the base of the leaflets and at the base of the petioles, called pulvinus.
- Somewhat similar turgor movements are found in insectivorous plants, whose leaves close up to entrap a living prey.
- The bending movements of certain flowers towards the sun and the sleep movements of the leaves of certain plants at night are also due to turgor movements.
संबंधित प्रश्न
Differentiate between Turgor pressure and Wall pressure (explain)
A plant cell placed in a certain solution got plasmolysed. What was the kind of solution?
When placed in a more concentrated solution, the cell contents will ______.
Distinguish between the following:
Turgor pressure and osmotic pressure
Name the following:
The process by which raisins swell up when placed in a beaker of water.
Give Reasons for the following.
It is necessary to maintain a normal osmotic concentration of the blood.
Give Reasons for the following.
Salt and sugar are used in preserving food.
Give Technical Term for the following.
A solution whose concentration is equal to the cell sap.
Fill in the Blanks
Diffusion is the movement of molecules from a region of their ________ concentration to the region of their ________ concentration.
