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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
How does temperature, light intensity and wind affect transpiration?
Transpiration helps in creating ______ force and in eliminating excess ______.
(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.
Choose the correct answer:
Who had said that "transpiration is a necessary evil"?
Briefly explain how the rate of transpiration is affected by:
Humidity of the atmosphere
Give Reasons for the following:
Why do some herbaceous plants show wilting of leaves during mid-day which again recover in the evening?
Explain the Term
Lenticel
State the Location:
Cuticle
Column ‘II’ is a list of items related to ideas in Column ‘I’. Match the term in Column ‘II’ with a suitable idea given in Column ‘I’.
| Column I | Column II |
| (i) Transpiration | (a) Cacti plants |
| (ii) Movement of water | (b) Stomata |
| (iii) Guttation | (c) Maize plant |
| (iv) Low rate of transpiration | (d)Xylem |
| (v) The high rate of transpiration | (e) Hydathodes |
