Biology · Plant Physiology - Phloem Transport
Which of the following best explains the pressure flow hypothesis (mass flow hypothesis) in phloem transport?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Osmotic pressure gradient between source and sink✓
- 2Active transport of sugars directly from sink to source
- 3Transport driven solely by gravitational force
- 4Movement of water only through xylem vessels
Correct answer
Osmotic pressure gradient between source and sink
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