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  • The continuity of water column is maintained due toOption: 1 CohesionOption: 2 Adhesion

The continuity of water column is maintained due to

Option: 1

Cohesion


Option: 2

Adhesion


Option: 3

Both a and b


Option: 4

None of these


Answers (1)

 

The hydrogen bonding between the water molecules causes a strong force of cohesion between the water molecules. The force of cohesion is responsible for high tensile strength of water. There exists a force of adhesion between water column and walls of xylem tracheary elements. The forces of adhesion and cohesion maintain the column of water such that it is not broken or pulled away from the walls of tracheary elements. The magnitude of cohesion is too large to be broken by resistances like weight of water column, resistance during translocation of water and air spaces in the intercellular spaces. Hence, the correct answer is option c.

 

Posted by

Ramraj Saini

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