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Doctors Medicines MCQs Q&A

  1. Cohesion theory 
  2. Passive transport
  3. Root pressure 
  4. Capillarity
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1 Answers

Option 1 : Cohesion theory 

Cohesion theory is the most acceptable theory for movement of water through plants. It is a theory of intermolecular attraction that explains the process of water flow upwards (against the force of gravity) through the xylem of plants.

Capillarity is the tendency of a liquid in a capillary tube or absorbent material to rise or fall as a result of surface tension.

Root pressure is the transverse osmotic pressure within the cells of a root system that causes sap to rise through a plant stem to the leaves.Passive transport is a movement of ions and other atomic or molecular substances across cell membranes without need of energy input.

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