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

Which of these phases of growth is not related to plant growth curve?

  1. Formative phase

  2. Maturation phase

  3. Survival phase

  4. Exponential phase

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

This growth phase is seen in bacteria, not in plants. In this phase, only some bacteria which can tolerate or resist unfavourable conditions will survive in the environment by producing endospores.

Multiple choice

What is the phenomenon of vernalisation concerned with?

  1. Induction of flowering in plants by cold treatment

  2. Thermoregulatory adaptation in cold-blooded animals

  3. Migration of birds from their homes to summer habitat.

  4. Preservation of plant germplasm at low temperature
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vernalisation is flowering at low temperature (true). 

Multiple choice

Which of the following is correct for stomata?

  1. Membrane around the cell.

  2. Pores on leaf surface.

  3. Pigment to help in photosynthesis.

  4. Central dark area in a cell.

  5. Membrane around the nucleus.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The pores on leaf surface are called stomata, which help in gas exchange and transpiration.

Multiple choice

When the bark of a tree is removed in a circular fashion all around near its base, it gradually dries up and dies because

  1. Water from soil cannot rise to aerial parts.

  2. Roots are starved of energy.

  3. Tree is infected by soil microbes.

  4. Roots do not receive oxygen for respiration.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In vascular plants, phloem is the living tissue that carries organic nutrients (known as photosynthate), in particular, glucose, a sugar, to all parts of the plant or particularly non-photosynthetic parts of the plant such as the roots.  Because phloem tubes sit on the outside of the xylem in most plants, a tree or other plant can be effectively killed by stripping away the bark in a ring on the trunk or stem. With the phloem destroyed, nutrients cannot reach the roots, and the tree/plant will die.

Multiple choice

Stomata is open and close due to ____________.

  1. circadian rhythm

  2. pressure of gases ouside the leaves

  3. pressure of gases inside the leaves

  4. turgor pressure of guard cells
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Turgor pressure of guard cells controls the opening and closing of stomatal pores.