The xylem water tension is strong enough to pull water to:
Correct answer: A. 200 meters
- A. 200 meters
- B. 400 feet
- C. 300 meters
- D. 500 feet
Explanation
The correct answer is "200 meters." Xylem water tension, a result of transpiration and the cohesive and adhesive properties of water, can pull water to great heights in plants, up to around 200 meters. This limit is determined by the physical properties of water and the structure of the xylem. The other options represent heights that are either within a typical range but not the maximum (400 feet, 500 feet) or exceed the maximum observed in nature (300 meters).
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About Forms and Functions of Plants
Plant nutrition and transport cover mineral uptake, photosynthesis, xylem movement of water and minerals, and phloem translocation of sugars. Plant growth regulators include auxins, gibberellins, cytokinins, abscisic acid and ethene, whose effects on cell division, elongation, dormancy, fruit ripening and tropic responses should not be confused with mineral nutrition.
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