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

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 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.

Multiple choice

White spongy cigar-like floating roots of hydrophytes

  1. remain in water

  2. remain in air

  3. float on water surface

  4. perform photosynthesis
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

White spongy cigar-like floating roots remain in air and help the plant in floating. These are single adventitious roots, which also help in respiration.

Multiple choice

Transpiration involves the

  1. loss of water from the leaves of plants

  2. loss of nutrients from the stems of plants

  3. filtration of water from the surface of the leaves of plants

  4. accumulation of water
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Transpiration involves the loss of water from the leaves of plants.

Multiple choice

In CAM plants, the stomata opens during night to

  1. retain water

  2. avoid photoinhibition

  3. recycle their internal CO2 efficiently

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

CAM plants open stomata at night to fix CO2 into malic acid, which simultaneously reduces water loss through transpiration, prevents photoinhibition by avoiding excess light absorption during the day, and allows efficient recycling of internally released CO2 during daylight hours. This nocturnal stomatal opening strategy is a key adaptation to arid conditions.