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प्रश्न
An outline sketch of a tree is shown in a diagram below. Study the same and answer the questions that follow:
- Name and define the phenomenon labelled A in the diagram.
- Write the significance of the process mentioned in A for the plants.
- What do the direction of the arrows in B and C indicate? Name the phenomena.
- Draw a neat and labelled diagram of an opened stomata.
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उत्तर
- Transpiration, in plants, is the evaporative loss of water from aerial portions (leaves and stems).
- Significance of transpiration for the plants:
- Cooling effect
- Creating Suction force
- Distribution of water and minerals.
- Arrow B shows water rising up the trunk, and the phenomenon is lenticular transpiration in the ascent of sap.
Endosmosis is the phenomenon whereby arrow C denotes water absorbed by roots from the earth. 
APPEARS IN
संबंधित प्रश्न
Mention the two ways in which transpiration helps the plants.
Which of the following statements are true and which ones are false? Give reason in support of your answer.
Some desert plants have sunked stomata on their leaves.
Why are the stomata in most plants more numerous on the lower surface of a leaf instead of being on the upper surface?
Given below is an apparatus which has setup to investigate a physiological process in plants. The setup was placed in bright sunlight. Answer the questions that follow:
Draw a neat, labelled diagram of a stomatal apparatus.
Answer the following (only in few words);
In which form, water comes out in transpiration?
Given below is an example of a certain structure and its special functional activity:
chloroplasts and photosynthesis
In a similar way, write the functional activity against the following:
Xylem and ______
Explain the Term :
Hydathode
Differentiate Between Transpiration and Perspiration.
State the Location:
Cuticle
Mark the most appropriate answer in the following:
Transpiration is very low during storms due to:
