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 is not an adaptation of desert plants?

  1. They lose very little water through transpiration.

  2. The leaves are either absent or very small.

  3. The leaves of these plants are spine-shaped.

  4. Photosynthesis is often carried out by stems.

  5. The trees are cone-shaped and have sloping branches.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

It is a property of the plants found in mountains.

Multiple choice

The surface of the leaf, uniformly coated with a water resistant waxy cuticle ______________.

  1. protects the excessive evaporation of water and decreases the absorption of ultraviolet or blue light to reduce heating

  2. gives strength to weak leaves

  3. protects it from germs attack

  4. gives it a shiny appearance

  5. protects its green colour
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Yes, it is correct. The surface of the leaf is uniformly coated with a water resistant waxy cuticle that protects the leaf from excessive evaporation of water and decreases the absorption of ultraviolet or blue light to reduce heating.

Multiple choice

In plants, transpiration facilitates in

  1. opening of stomata

  2. absorption of water by roots

  3. excretion of minerals

  4. electrolyte balance
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Transpiration is the major mechanism that derives the movement of water through a plant. It is described as the engine that pulls water up from the roots to leaves.

Multiple choice

Transpiration pull will be maximum under which of the following conditions?

  1. Open stomata, high humid atmosphere and well irrigated soil

  2. Open stomata, high humidity in atmosphere and dry soil

  3. Open stomata, dry atmosphere and moist soil

  4. Closed stomata, dry atmosphere and dry soil
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Rate of transpiration will be maximum, if the stomatal pores are open, atmosphere is dry and soil is moist.