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प्रश्न
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.
पर्याय
True
False
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उत्तर
False
Reason: Hydathodes are special pores present on the ends of leaf veins through which guttation occurs and water droplets are given out. Their openings cannot be regulated. Stomata on the other hand are minute openings in the epidermal layer of leaves through which exchange of gases as well as transpiration occurs. Water is given out as water vapour. Stomatal opening is regulated by guard cells.
संबंधित प्रश्न
Name the factors which affect the rate of transpiration? State their role in each case.
Mention the two ways in which transpiration helps the plants.
Given below is an apparatus which was setup to investigate a physiological process in plants. The setup was placed in bright sunlight. Answer the questions that follow:
- Name the process being studied. Define the process.
- Why was the pot enclosed in a rubber sheet?
- Mention two external factors which can accelerate the above process.
- List two adaptations in plants to reduce the above process.
- Draw a neat, labelled diagram of a stomatal apparatus.
The diagram alongside represents a structure found in a leaf. Study the same and answer the questions that follow:
(i) Name the parts labeled A and B.
(ii) What is the biological term for the above structure?
(iii) What is the function of the part labeled A?
(iv) Mention two structural features of A, which help in the function mentioned in (iii) above?
(v) Where is this structure likely to be found in a leaf?
(vi) The structure (fig.5.22) helps in the process of transpiration. Explain the term transpiration.
(vii) How many other cells are found surrounding this structure as seen in the diagram?
The cause of wilting is more because of ______.
Complete the following sentence with appropriate word:
Plants become cool as a result of __________.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Transpiration takes place only in green plants
Write the functional activity of the following structure:
Hydathodes
Choose the Odd One Out
