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Transpiration - 2

Questions covering transpiration processes, measurement, advantages, related water transport mechanisms, and factors affecting transpiration rates in plants

14 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

How do plants manage the excessive water absorption by roots?

  1. Using it in respiration
  2. Removing it through transpiration
  3. Removing it through guttation
  4. Reserving it for photosynthesis
Question 2 Multiple Choice (Single Answer)

Which of the following structures allow guttation?

  1. Stomata
  2. Hydathodes
  3. Lenticels
  4. Phloem
Question 3 Multiple Choice (Single Answer)

How do forests contribute in bringing rain?

  1. By increasing the moisture in the atmosphere through transpiration.
  2. By cooling the atmosphere through transpiration.
  3. By reducing the CO2 content of atmosphere.
  4. By increasing the O2 content of atmosphere.
Question 4 Multiple Choice (Single Answer)

Which of the following characteristics of xylem aids in ascent of sap?

  1. Thick walled xylem cells
  2. Narrow diameter of xylem vessels
  3. Hypertonic nature of xylem cells
  4. Adhesive force between xylem and water
Question 5 Multiple Choice (Single Answer)

What is the advantage of having narrow leaves of plants?

  1. It reduces guttation.
  2. It reduces transpiration.
  3. It increases photosynthesis.
  4. It increases light absorption.
Question 6 Multiple Choice (Single Answer)

Which of the following factors is responsible for bleeding in plants?

  1. Root pressure
  2. Thick cuticle
  3. Transpiration
  4. Presence of hydathodes
Question 7 Multiple Choice (Single Answer)

Which of the following forces helps in making a continuous column of water in xylem?

  1. Force of adhesion
  2. Force of gravitation
  3. Force of cohesion
  4. Osmotic pressure
Question 8 Multiple Choice (Single Answer)

Which of the following is not an advantage of transpiration?

  1. Cooling effect
  2. Absorption of CO2
  3. Distribution of mineral salts
  4. Creating suction force
Question 9 Multiple Choice (Single Answer)

Which of the following statements is NOT true?

  1. Only about 2% of absorbed water is used in photosynthesis.
  2. Potometer measures the water uptake by the cut shoot to determine transpiration.
  3. Cuticular transpiration is regulated by the amount of water in surrounding cells.
  4. Stomatal transpiration does not occur during night.
Question 10 Multiple Choice (Single Answer)

Which of the following statements is NOT true?

  1. Transpiration helps in ascent of sap.
  2. Transpiration is affected by wind velocity.
  3. Rate of transpiration increases with increase in atmospheric pressure.
  4. Thick cuticle reduces transpiration.
Question 11 Multiple Choice (Single Answer)

Which of the following instruments is used to measure transpiration?

  1. Potometer
  2. Hydrometer
  3. Voltmeter
  4. Sphygmomanometer
Question 12 Multiple Choice (Single Answer)

Match the following
(i) Transpiration (A) Carbon dioxide
(ii) Guttation (B) Ruptured surface of plant
(iii) Bleeding (C) Lenticels
(iv) Stomata (D) Pores bearing structures on leaf
  1. (i) - (C), (ii) - (B), (iii) - (D), (iv) - (A)
  2. (i) - (C), (ii) - (D), (iii) - (B), (iv) - (A)
  3. (i) - (B), (ii) - (A), (iii) - (D), (iv) - (C)
  4. (i) - (D), (ii) - (C), (iii) - (B), (iv) - (A)
Question 13 Multiple Choice (Single Answer)

Which of the following conditions will be the most favourable for transpiration to occur?

  1. Hot and humid climate
  2. Hot and dry climate
  3. Cloudy and humid climate
  4. Cloudy and dry climate
Question 14 Multiple Choice (Single Answer)

Which of the following statements is NOT true for guttation?

  1. It occurs through special pores present in the leaves, called hydrathodes.
  2. It particularly happens in plants growing in warm humid conditions.
  3. It does not have any cooling effect on plant's body.
  4. Water lost does not contain any salt.
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