Xylem vessel walls contain
Salam Academy Original Practice · Proposed mark scheme
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12 questions
Water is pulled up the xylem mainly by
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The Casparian strip
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Transpiration rate decreases when
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A xerophyte adaptation is
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Sucrose is loaded into phloem sieve tubes by
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In the mass flow hypothesis, water enters phloem at the source because
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Companion cells have many mitochondria because they
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A potometer must be set up underwater to
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A sink in phloem transport could be
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The apoplast pathway carries water through
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A potometer bubble moves 30 mm in 5 min in a capillary of radius 0.5 mm. Calculate the rate of water uptake (mm³ min⁻¹).
Salam Academy Original Practice · Proposed mark scheme