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

Plants can fail for for which of these reasons?

  1. drought

  2. poor soil

  3. disease/insects

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

Agricultural failure is complex and can be caused by environmental stressors like drought, soil degradation, or biological threats like pests and diseases. Therefore, all listed factors contribute to potential crop failure.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

All the following are the adaptations of land plants except

  1. Protection of the embryo from drying out

  2. Waxy cuticle on leaves to prevent drying out

  3. Waxy cuticle on roots to prevent drying out

  4. Vascular system (in most plants) to move water internally
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Land plants have the vascular system for the movement of water and food internally this includes xylem and phloem.
The embryo is protected from drying out by providing the membranes which help in protecting the embryo.
There is a waxy cuticle on the leaves and this acts as a barrier for the excessive water loss which happens due to transpiration and this prevents leave from drying.
There is no waxy cuticle on the roots as if there is a waxy cuticle on the root then it would be very difficult to absorb water.
So, the correct option is 'waxy cuticle on roots to prevent them from drying out.'
Multiple choice

What is NOT an important role of water in plants?

  1. for nutrient transfer

  2. for photosynthesis

  3. to dissolve soil

  4. for transpiration
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Water is essential for nutrient transport, photosynthesis, and transpiration, but it does not dissolve soil itself; it dissolves nutrients within the soil.

Multiple choice

How does water travel through a plant from beginning to end?

  1. stem - leaves - roots - soil

  2. leaves - stem - roots - soil

  3. soil - roots - stem - leaves

  4. soil - leaves - roots - stem
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Water is absorbed by the roots from the soil, travels up through the stem via the xylem, and reaches the leaves.

Multiple choice

Why does a plant's roots need oxygen to help the plant grow?

  1. to gather water & nutrients from the soil

  2. to synthesize carbon dioxide

  3. to oxygenate the chlorophyll

  4. to help absorb the Sun's energy
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Roots require oxygen for cellular respiration, which provides the energy necessary for active transport. This energy is used to absorb water and mineral nutrients from the soil.