Biology Circulation / Transport ETEA 2022
PMDC Verified Question 28 of 54
____ is the attractive force between a water molecule and container.
A
Cohesion
B
Adhesion
C
Tension
D
Transpiration
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Adhesion
Concept:

Water molecules exhibit unique attractive forces that assist in transport mechanisms within the xylem.

Formula:

None

Solution:

  • Adhesion is the attractive force between water molecules and unlike surfaces, such as the walls of the xylem vessels (or a container).


  • This property prevents water columns from collapsing under gravity.


Why other options are incorrect:

  • Cohesion: The attractive force between water molecules themselves.


  • Tension: The pulling force exerted on the water column by transpiration.

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