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Question
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.
Options
True
False
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Solution
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.
RELATED QUESTIONS
(a) State whether the following statement are True or False.
(b) Rewrite the false statement in (a) above in the correct form by changing either the first or the last word only.
Transpiration creates a pull for the upward movement of the sap.
Which of the following statements are true and which ones are false? Give reason in support of your answer.
Most transpiration occurs during midday.
The figure given below represents an experimental setup with a weighing machine to demonstrate a particular process in plants. The experimental setup was placed in bright sunlight. Study the diagram and answer the following questions.
What is the purpose of keeping the test tube B in the experimental setup?
What is meant by the term transpiration stream?
Give Reasons for the following:
Plants absorb more water than their requirement
Explain the Term
Lenticular
Name the following:
Holes present on the surface of the stems and twigs for transpiration.
Complete the following sentence with appropriate word:
Plants become cool as a result of __________.
Complete the following sentence with appropriate word:
Transpiration is the loss of water__________________from the leaves of the plant.
State the Location:
Hydathodes
