Biology

Plant Transport and Physiology

1,834 Questions

Access a comprehensive set of questions on plant transport mechanisms and physiological adaptations. Topics include water movement, translocation of food, and plant responses to external stimuli. These biology questions are essential for medical entrance exams and other science competitive tests.

Xylem and phloem transportTranspiration and evaporationPlant adaptationsGeotropic and phototropic responsesWater absorption by rootsRespiration in roots

Plant Transport and Physiology Questions

Multiple choice

Which of the following statements is NOT true?

  1. Cuticle is secreted by epidermis.

  2. Desert plants tend to have thicker cuticle.

  3. Thickness of cuticle is directly proportional to rate of transpiration.

  4. Thickness of cuticle varies from plant to plant.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Thickness of cuticle is inversely proportional to rate of transpiration. The greater the thickness of the cuticle, the lesser is the evaporation.

Multiple choice

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.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Narrow leaves have less surface area. So, it reduces loss of water through transpiration. Plants with narrow leaves are usually found in dry climate.

Multiple choice

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.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cuticular transpiration is not regulated.

Multiple choice

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.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Rate of transpiration increases with decrease in atmospheric pressure.

Multiple choice

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)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Transpiration occurs through lenticels. Guttation occurs through hydathodes. CO2 is absorbed through stomata.

Multiple choice

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.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Water lost through guttation contains salt in solution.