What provides the driving force for the movement of water through the xylem according to the Cohesion-Tension theory?
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Correct answer: Transpiration pull
The evaporation of water from leaves (transpiration) creates a negative pressure or 'pull.' Because water molecules are cohesive, this tension is transmitted down through the xylem, pulling water up from the roots.
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More Xylem questions
- Scalariform thickenings in xylem vessels resemble the rungs of a:
- Which of the following xylem elements is characterized by being dead at maturity and having highly lignified, perforated end walls?
- What is the only living component of the xylem tissue in a mature plant?
- In the primitive vascular plants like Pteridophytes and most Gymnosperms, water conduction is primarily carried out by:
- Which type of xylem is formed first during primary growth and typically has narrow tracheary elements?
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