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प्रश्न
What is meant by the term transpiration stream?
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उत्तर
A pulling force called suction, caused by the evaporation of water in a leaf draws a long, continuous column of water through the xylem from the root to the leaf. This is called the transpiration stream.
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संबंधित प्रश्न
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 each of the following:
Thick cuticle and ………………………..
Which of the following statements are true and which ones are false? Give reason in support of your answer.
Most transpiration occurs during midday.
Choose the correct answer:
Transpiration generates __________
Explain the Term
Transpiration
Explain the Term
Lenticular
Study the diagram given alongside and answer the questions that follow:
(i) Explain the physiological process of being study.
(ii) What will be the observations in the two test-tubes after about 2-3 days?
(iii) Give a reason for your answer in (ii) above.
(iv) Why is the surface of water covered with oil?
(v) State the purpose of setting up test tube B.
Complete the following sentence with appropriate word:
Transpiration normally takes place in the presence of ___________.
Mark the most appropriate answer in the following:
In hot summer days, plant cooling is due to :
Transpiration is significant for all except ______.
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.
