NEET · BiologyEasy
The movement of sucrose from the source to the sink in plants is explained by:
- A.Pressure flow hypothesis
- B.Cohesion-tension theory
- C.Root pressure theory
- D.Imbibition theory
Show correct answer & step-by-step solution
Correct answer: A — Pressure flow hypothesis
Solution
- Sucrose is loaded into the phloem at the source.
- This creates a high osmotic pressure in the phloem.
- Water enters from the xylem, creating a pressure gradient.
- The pressure flow hypothesis explains this mass flow.
- Hence the answer is (A).
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