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

What is the function of sclerenchyma (a plant tissue)?

  1. Transports food

  2. Support above ground

  3. Cell division

  4. Conduction of water
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sclerenchyma cells have thick, lignified walls that provide structural support and rigidity to the plant body. They are typically found in mature parts of the plant that are no longer growing.

Multiple choice

Which of the following modified roots help the plant in the process of respiration?

  1. Assimilatory roots

  2. Floating roots

  3. Haustoria

  4. Annulated roots

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

Thses roots are found in aquatic plants. These roots develop from the nodes of the floating branches. The roots are spongy and are colourless. These roots are present above the level of water. As these roots are spongy and soft they store air in them, which help the plant in floating. They also help in respiration process.

Multiple choice

In the course of evolution, leaves of the angiosperms have adapted to different environments. Which of the following features regarding the adaptations of leaves is FALSE?

  1. May become false flowers

  2. May become translucent

  3. Can trap humidity

  4. Minimizes heating

  5. May deter herbivores
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In harmful levels of sunlight, specialised leaves, opaque or partly buried, admit light through translucent windows for photosynthesis at inner leaf surfaces. For e.g., Fenestraria.

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.