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 bio-chemistry absorption by roots - the processes involved diffusion transport across membrane means of transport

Substances which can be moved through diffusion in plants are

  1. Ions

  2. Sugar

  3. Urea

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Diffusion may be defined as the process of movement of gases. liquids or solutes from the region of higher concentration to the regions of lower concentration till the molecules are uniformly distributed throughout the available space dissolved sugars and ions of potassium and sodium can pass through cell surface membranes by diffusion. Waste products such as urea also pass out of the cell through its membrane by cell diffusion helps in exchange of gases during respiration and photosynthesis. It is also responsible for transpiration.

So, the correct answer is D.

Multiple choice bio-chemistry absorption by roots - the processes involved diffusion transport across membrane means of transport

Water in adjacent xylem moves into the phloem by process of :

  1. Simple diffusion

  2. Active transport

  3. Osmosis

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

Water is passively transported into the roots and then into the xylem. The forces of cohesion and adhesion cause the water molecules to form a column in the xylem. Water moves from the xylem into the mesophyll cells, evaporates from their surfaces and leaves by diffusion through the stomata. The increased solute concentration causes water to move by osmosis from the xylem into the phloem. The positive pressure that is produced pushes water and solutes down the pressure gradient. So, the correct answer is "Osmosis".

Multiple choice bio-chemistry absorption by roots - the processes involved diffusion transport across membrane means of transport

Aquatic plants lose most of their metabolic wastes by .......... process.

  1. Diffusion

  2. Osmosis

  3. Reverse osmosis

  4. Dialysis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Aquatic plants lose most of their metabolic wastes by diffusion directly into the water, surrounding them as the concentration of that metabolic wastes is more in the cell as compared to the surroundings. They do not have to store the waste products as terrestrial plants do. Thus, the correct answer is option A.

Multiple choice evs - i sources of water the lithosphere and the hydrosphere first aid safety and first aid

Which of the following is most important in water cycle?

  1. Transpiration through leaves

  2. Evaporation from the oceans

  3. Percolation of water into the ground

  4. Absorption of capillary water by plants
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Evaporation from the oceans is the most important in water cycle, because it comprises of the major part of global water cycle.

Multiple choice evs - i sources of water the lithosphere and the hydrosphere first aid safety and first aid

Water remaining in the soil after a plant has permanently wilted is

  1. Hygroscopic water

  2. Ground water

  3. Gravitational water

  4. Capillary water
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Hygroscopic water is the water held tightly by the soil and cannot be taken up by plant roots because this water forms very thin films around soil particles and is not available to the plant. Thus the correct answer is option A.
Multiple choice

The process by which plants lose water vapor through their leaves is called:

  1. Photosynthesis

  2. Respiration

  3. Transpiration

  4. Decomposition

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

Transpiration is the process by which plants lose water vapor through their leaves, which helps to regulate their temperature and transport nutrients.

Multiple choice

What is the process of providing water to fruit trees called?

  1. Irrigation

  2. Fertilization

  3. Pruning

  4. Harvesting
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Irrigation is the process of providing water to fruit trees.

Multiple choice

The process by which plants absorb water and nutrients from the soil is known as:

  1. Transpiration

  2. Photosynthesis

  3. Respiration

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

Absorption is the process by which plants take in water and nutrients from the soil through their roots.

Multiple choice

The process by which plants release water vapor into the atmosphere through their leaves is called:

  1. Transpiration

  2. Photosynthesis

  3. Respiration

  4. Absorption
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Transpiration is the process by which plants release water vapor into the atmosphere through their leaves.

Multiple choice

What is the function of the stomata in plants?

  1. Gas exchange

  2. Water absorption

  3. Transpiration

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Stomata are small pores in the epidermis of leaves that allow for gas exchange, water absorption, and transpiration.

Multiple choice

What is the function of the root cap in plants?

  1. Protection

  2. Water absorption

  3. Anchorage

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The root cap is a protective layer of cells at the tip of the root that protects the root as it grows through the soil. It also helps the root absorb water and anchor the plant in the soil.

Multiple choice

What is the function of the xylem in plants?

  1. Transporting water

  2. Transporting nutrients

  3. Providing support

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The xylem is a type of vascular tissue that transports water from the roots to the leaves.

Multiple choice

What is the function of the phloem in plants?

  1. Transporting water

  2. Transporting nutrients

  3. Providing support

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The phloem is a type of vascular tissue that transports nutrients from the leaves to the rest of the plant.

Multiple choice

What is the process by which plants release water vapor into the atmosphere?

  1. Evaporation

  2. Condensation

  3. Precipitation

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

Transpiration is the process by which plants release water vapor into the atmosphere through their leaves.

Multiple choice

What is the term used to describe the process by which plants lose water vapor through their leaves?

  1. Transpiration

  2. Photosynthesis

  3. Respiration

  4. Germination
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Transpiration is the process by which plants release water vapor into the atmosphere through their leaves.