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

Why trees in the mountains regions are normally cone shaped and have sloping branches?

  1. To retain water

  2. To slide off snow and rain water

  3. To reduce transpiration

  4. To enhance water conduction
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Mountain regions have a lower temperature and have extensive rain fall and snow fall so the trees growing in the mountain regions are adapted to grow there by having cone shaped and sloping branches so that the rain water or snow does not reside over there and get removed itself.

Multiple choice

Where does ascent of sap take place in xylem of a plant?

  1. In the tracheids with associated xylem parenchyma

  2. In the walls of tracheary element

  3. In xylem parenchyma

  4. In the lumen of tracheary element
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ascent of sap takes place in the lumen of tracheary element in xylem of a plant.

Multiple choice

Which of the following causes hot weather wilting in plants?

  1. Excessive transpiration and reduced absorption

  2. Excessive transpiration and absorption

  3. Reduced transpiration and absorption

  4. Reduced transpiration and excessive absorption
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Excessive transpiration and reduced absorption causes hot weather wilting in plants.

Multiple choice

Which of the following helps in the bidirectional translocation of minerals?

  1. Parenchyma

  2. Cambium

  3. Phloem

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

Phloem helps in the bidirectional translocation of minerals.It consists of: conducting cells, generally called sieve elements; parenchyma cells, including both specialized companion cells or albuminous cells and unspecialized cells; and supportive cells, such as fibres and sclereids.

Multiple choice

Why are sieve tubes suited for translocation of food?

  1. Because of bordered pits

  2. Because of no end wall

  3. Because of broader lumen and perforated cross walls

  4. Because of bordered pits and without protoplasm
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

 Sieve tubes are suited for translocation of food because of broader lumen and perforated cross walls. 

Multiple choice

How is transpiration important for a plant?

  1. It helps in the absorption of minerals.

  2. It helps to regulate temperature.

  3. It is a major driving force in movement of water in xylem.

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

Transpiration is important for a plant because it helps in the absorption of minerals, regulation of temperature and is the major driving force in movement of water in xylem.