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

Match the following:

 
(i) Root pressure (A) Salting of meat
(ii) Plasmolysis (B) Guttation
(iii) Xylem (C) Stomata
(iv) Transpiration (D) Water and salt

  1. (i) – (C), (ii) – (A), (iii) – (D), (iv) – (B)

  2. (i) – (B), (ii) – (A), (iii) – (D), (iv) – (C)

  3. (i) – (A), (ii) – (C), (iii) – (D), (iv) – (B)

  4. (i) – (C), (ii) – (D), (iii) – (B), (iv) – (A)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Root pressure is responsible for guttation. Salting of meat kills germ by plasmolysis. Xylem conducts salt and water. Transpiration occurs through stomata.

Multiple choice

Which of the following functions is NOT carried out by roots?

  1. Fixation of plant in soil

  2. Producing a suction force through transpiration

  3. Absorption of nitrates

  4. Conduction of absorbed water to the upper parts of the plant
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Transpiration occurs through stomata, which is absent in roots.

Multiple choice

Drought is a significant environmental stressor that affects overall plant growth. The drought stress response in plants includes complex adaptive biological processes that help plants to survive under various conditions. Which of the following amino acids accumulates as a response to drought stress condition of plants?

  1. Tryptophan

  2. Methionine

  3. Proline

  4. Glutamic acid

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

Proline accumulates as a response to drought stress condition of plants.

Multiple choice

Which of the following is not a function of the root system?

  1. Absorption of water from the soil

  2. Providing a proper anchorage to the plant parts

  3. Absorption of minerals from the air

  4. Storing reserve food material

  5. Synthesis of plant growth regulators
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct option as this is not a function of the root system. The function of roots is the absorption of minerals from the soil, and not from air.

Multiple choice

The pneumatophores, modified roots grow

  1. into the soil like fingers

  2. deep into the soil

  3. hanging from the branches of trees downward

  4. upward out of the water or mud

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Yes, it is correct. Pneumatophores are specialised root that grows upwards out of the water or mud to reach the air and obtain oxygen for the root systems of trees that live in swampy or tidal habitats.