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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
A plant cell placed in a certain solution got plasmolysed. What was the kind of solution?
What is responsible for guttation?
Give the equivalent terms for the following:
Pressure of the cell contents on the cell wall
Distinguish between the following:
Turgor pressure and osmotic pressure
Choose the correct answer:
If a marine plant is transferred to fresh water, it bursts due to ___________
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.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Osmosis is defined as the movement of water from a concentrated sugar solution to a dilute sugar solution.
Multiple Choice Question:
Osmosis involves:
The given statement is incorrect. Rewrite the correct statement:
Fresh water fish when placed in hypertonic salt solution absorb water and burst.
