Advertisements
Advertisements
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.
Advertisements
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
Describe an experiment to show that the plant loses water through its leaves.
Which of the following statements are true and which ones are false? Give reason in support of your answer.
Hydathodes are similar to stomata in plant physiology.
Which of the following statements are true and which ones are false? Give reason in support of your answer.
Atmospheric humidity promotes transpiration from a green plant.
Answer the following (only in few words);
In which form, water comes out in transpiration?
Distinguish between the following:
Transpiration and evaporation
Give Reasons for the following:
Transplanting of seedlings to a flowerbed in the evening is better than doing so in the morning.
Give Reasons for the following:
Land plants die if their roots remain waterlogged.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Evaporation is a physiological process
Write the functional activity of the following structure:
Hydathodes
