Biology

Plant Transport and Physiology

2,012 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

A blight or a blotch is associated with which of the following?

  1. Leaf spots

  2. Gray mold

  3. Powdery mildew

  4. Fusarium and Verticillium wilt

  5. Asparagus rust
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A vast number of fungi can cause spots on the leaves of plants. Most of them are of little consequence. A typical spot has a definite edge and often has a darker border. When lots of spots are present, they can grow together and become a blight or a blotch.

Multiple choice

Which of the following statements is true about guttation in plants?

  1. It involves exudation of water through roots.

  2. It involves exudation of water through stomatal apertures.

  3. It involves exudation of water and salts through roots and leaf margins.

  4. It involves exudation of water and salts through hydathodes.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hydathodes are specialised openings on leaves to facilitate guttation and it involves exudation of water along with some solutes as evident on examination of the fluid deposited.

Multiple choice

Which of the following options best describes hydathodes?

  1. Pores in the bark

  2. Pores through which transpiration takes place

  3. Special openings in the leaf through which liquid water is forced out

  4. Stomata in water plants

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

A hydathode is a type of secretory tissue in leaves, usually found in angiosperms, that secretes water through pores in the epidermis or margin of leaves, typically at the tip of a marginal tooth or serration.

Multiple choice

Which of the following statements is/are false?

a. Plants need carbon dioxide, water and sunlight for their survival. b. In animals, transportation is brought about by the circulatory system. c. The water required for preparing food by the plants is absorbed from the soil through the shoot system.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option as this statement is false. The water required for preparing food by the plants is absorbed from the soil through the root system.

Multiple choice

Which of the following statements is/are false?

a. The xylem element increases the surface area of the roots for absorbing water and minerals dissolved in water. b. Diffusion is the movement of particles from higher concentration to a low concentration area untill they are spread out evenly. c. The excess water that is absorbed is lost by the plant in vapour form to its surroundings by the process of transpiration.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct option as this statement is false. The root hair increases the surface area of the roots for absorbing water and minerals dissolved in water.