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

When water evaporates in the presence of sunlight is called

  1. transpiration

  2. condensation

  3. cloud formation

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

Transpiration is the process by which plants lose water vapor through their leaves, especially in sunlight. While simple evaporation occurs from any water surface, transpiration specifically refers to water loss from plant parts.

Multiple choice

Wilting of a plant is caused by

  1. xylem blockage

  2. phloem blockage

  3. the removal of epidermis and a few roots

  4. removal of pith

  5. none of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Blockage of xylem causes plant to wilt because water cannot be transported.

Multiple choice

Root hair absorb water from the soil on account of :

  1. turgor pressure

  2. suction pressure

  3. osmotic pressure

  4. root pressure

  5. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Plants absorb water from the soil by osmosis. Root hair cells are adapted for this by having a large surface area to speed up osmosis.

Multiple choice

Match the columns ||| |---|---| |Habitat|Adaption| |a. Desert|i. Plants have very short stems and small roots and the stems are hollow.| |b. Aquatic|ii. Trees with broad-shaped leaves shed their leaves before winter.| |c. Mountain|iii. Plants store water in stems.|

  1. a - ii, b - iii, c - i

  2. a - iii, b - ii, c - i

  3. a - i, b - ii, c - iii

  4. a - iii, b - i, c - ii

  5. -
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct answer. All options are matched correctly.

Multiple choice

Which of the following statements about central zone is false?

  1. Central zone is a small group of rapidly dividing cells.

  2. Central zone cells function like stem cells.

  3. Central zone plays a prominent role in meristem maintenance.

  4. Central zone is present at the meristem summit.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is false. Central zone is a small group of fast dividing cells.

Multiple choice

Which part of trees maintain the water table?

  1. Stem

  2. Flowers

  3. Roots

  4. Branches

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Tree roots play a crucial role in maintaining the water table by absorbing water from deeper soil layers and preventing rapid runoff. The extensive root network acts as a natural pump and retention system, while stems, flowers, and branches do not directly interact with groundwater tables.