A Levels Biology (9700)•9700/14/M/J/25
Explanation
Xylem Transports Water/Minerals; Phloem Transports Sugars/Amino Acids
Steps:
- Xylem conducts water and dissolved minerals upward from roots.
- Phloem transports sucrose, amino acids, and water (as sap solvent) bidirectionally.
- Plant K invades xylem, accessing water and minerals.
- Plant L invades phloem, accessing water, amino acids, and sucrose.
Why B is correct:
- Matches xylem's role in mineral transport and phloem's role in organic solute (sucrose, amino acids) transport per plant vascular tissue definitions.
Why the others are wrong:
- A: Omits minerals from xylem and amino acids from phloem.
- C: Excludes minerals from xylem; phloem lacks significant minerals.
- D: Omits amino acids from phloem.
Final answer: B
Topic: Structure of transport tissues
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