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प्रश्न
Answer the following question.
What is the significance of transpiration?
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उत्तर
Significance of transpiration:
1. It removes excess of water.
2. It helps in the passive absorption of water and minerals from the soil.
3. It helps in the ascent of sap.
4. As stomata are open, gaseous exchange required for photosynthesis and respiration is facilitated.
5. It maintains the turgor of the cells.
6. Transpiration helps in reducing the temperature of leaf and in imparting a cooling effect.
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संबंधित प्रश्न
What is dark reaction in photosynthesis?
Very short answer question.
Mention the shape of guard cells in Cyperus.
Answer the following question.
Explain the role of transpiration.
Explain the root pressure theory.
Why is transpiration is called ‘a necessary evil’?
Sketch and label:
Types of guard cells
Match the columns:
| Column A (Scientist) | Column B (Theory) | ||
| (1) | Dixon and Joylly | (a) | Starch-sugar inter-conversion theory |
| (2) | Steward | (b) | Osmotic absorption theory |
| (3) | Atkins and Pristley | (c) | Non-osmotic absorption theory |
| (4) | Kramer and Thimann | (d) | Cohesion tension theory |
What are the limitations of root pressure theory?
Аccessory cells of stomata are reservoirs of ______.
Statement I - During night, guard cells become flaccid.
Statement II - During day time, guard cells become turgid due to endosmosis.
In light of above statements, choose the most appropriate answer from the option given below.
