First slide

Transpiration

Question

Read the following statements carefully and choose the correct option:
A: Cohesion, adhesion and surface tension are responsible for providing high tensile strength and high capillarity to water.
B: In plants, capillarity is aided by the small diameter of the tracheary elements.

Easy

A

A is correct but B is incorrect
B

A is incorrect but B is correct
C

Both A and B are correct
D

Both A and B are incorrect

Solution

Cohesion, adhesion and surface tension give water high tensile strength, i.e., an ability to resist a pulling force, and high capillarity, i.e., the ability to rise in thin tubes. In plants capillarity is aided by the small diameter of the tracheary elements – the Tracheids and Vessel elements.

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