The 'transpiration pull' or suction force that pulls water up from the roots is best explained by which theory?
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Correct answer: Cohesion-tension theory
Proposed by Dixon and Joly, the cohesion-tension theory explains that water molecules stick together (cohesion) and to xylem walls (adhesion), forming a continuous column pulled upward by transpiration.
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More Transpiration questions
- During the day, stomata usually open due to the influx of which ions into the guard cells?
- What is the term for the loss of liquid water droplets from the margins of leaves, often mistaken for dew?
- Which of the following is an adaptation in xerophytes (desert plants) to reduce transpiration?
- In dorsiventral leaves (dicots), stomata are typically more numerous on the:
- Which plant hormone is known as the 'stress hormone' because it induces stomatal closure during water scarcity?
- Which of the following environmental factors will significantly increase the rate of transpiration?