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 incorrect?

  1. Plasma membrane is the outermost covering of a plant cell.

  2. Plasma membrane allows only selected materials to move in and out of the cell.

  3. Plasma membrane is living.

  4. The movement of water across the plasma membrane is called osmosis.

  5. The plasma membrane is flexible.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This statement is incorrect. Thus, it is the correct answer. Plasma membrane is the outermost covering of an animal cell. Cell wall is the outermost covering of a plant cell.

Multiple choice

Which of the following allows uptake of water by root hair through osmosis?

  1. Higher concentration of water molecules in root cells.

  2. Increased surface area of roots by root hairs

  3. Low concentration of water molecules in soil.

  4. Semi permeability of plasma membrane of root hair cells.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Osmosis occurs across semi permeable membrane. It allows movements of water from soil (high concentration of water) to the root hair (low concentration of water)

Multiple choice

Which of the following is TRUE for epiblema?

  1. It is the skin of root which outgrows to form root hair.

  2. It consists of specialized cells that provide flexibility to the stem.

  3. It helps in transportation of minerals and water to leaves.

  4. It is responsible for the process of transpiration.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Epiblema is the skin of root which outgrows to form root hair.

Multiple choice

Which of the following statements are incorrect?

  1. Earthworms breathe through their lungs.

  2. Plants absorb water through their roots.

  3. Female monkeys feed their babies with their milk.

  4. Touch-me-not leaves fold themselves when touched.

  5. Plants move towards sunlight.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Earthworms breathe through their skin. Gas exchange takes place directly through their skin. This allows the worm breath because they do not have lungs.

Multiple choice

Which of the following properties of plants shows that they are sensitive?

  1. They grow towards sunlight.

  2. They respire through stomata.

  3. They produce their own food.

  4. They can reproduce.

  5. They grow themselves.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sensitivity means when the things respond to the changes in the surroundings. A plant usually responds to change as it moves or bends towards sunlight. This shows that plants are sensitive and can respond to the changes that occur in surroundings.

Multiple choice

Wilting of the plant occurs when

  1. xylem is blocked

  2. phloem is blocked

  3. both xylem and phloem are blocked

  4. a few roots are removed

  5. apical bud is removed
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Wilting of the plant occurs when there is scarcity of water in the plant. Xylem is responsible for the movement of water throughout the plant. Hence, when the xylem is blocked, it causes wilting of the plant.