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

The stem of a jute plant is immersed in water for

  1. harvesting

  2. easy separation of fibre

  3. early flowering

  4. suitable cultivation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The stem of a jute plant is immersed in water for the easy separation of jute fibers. The stem then rots and the fibers are separated by hand. 

Multiple choice

When is the stem of the jute plant immersed in water?

  1. After harvesting

  2. Before flowering

  3. After bud formation

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

The stem of jute plant is the source of jute fibres. The jute stem is immersed in water for a few days after harvesting, so that the stem may rot and fibers may be separated by hand. 

Multiple choice

Which of the following states the importance of transpiration in plants?

  1. The low rate of transpiration will lead the plant to die.

  2. Without transpiration, the plant won't be able to photosynthesise.

  3. Without transpiration, plant cannot uptake water and nutrients from the soil.

  4. Its absence adversly affects overall funtioning of plants.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

 Transpiration creates negative pressure in adjacent subsidiary cells of the stomata, which get transferred down the xylem, which results in uptake of the water and nutrients from the soil which is ultimately utilised in the process of photosynthesis. Thus, its absence can affect overall functioning of plants.

Multiple choice

The only means of gaseous movement within the plant body is

  1. cyclosis

  2. putrefaction

  3. diffusion

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

The only means of gaseous movement within the plant body is diffusion. Diffusion is the movement of particles of different substances including the gaseous particles from the region of higher concentration to the region of lower concentration.

Multiple choice

Phototrophic movements of roots and stems are due to

  1. action of gravity

  2. effect of light

  3. differential hormonal effect

  4. epinasty and hyponasty

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

 This option is correct because phototropism is directional growth in which the direction of growth is determined by the direction of the light source. In other words, it is the growth which response to a light stimulus.

Multiple choice

Geotropic responses in the roots are due to

  1. inhibition of growth in the stem

  2. uniform growth on all sides of the root

  3. more growth on the upper side of the root

  4. more growth on the lower side of the root
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This option is correct because geotropic responses in the roots occur due to more growth on the upper side of the root.

Multiple choice

Response of a plant in turning towards the source of light is known as

  1. tropism

  2. habit

  3. climatic response

  4. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This option is correct because movement of plant in response to an external stimulus is known as tropism. One of this stimulus can be a source of light to which the plants show response by bending. This process is known as phototropism.