Identifying phloem for organic solute transport in plant cross-sections

Steps:

• Recall that phloem transports organic solutes like sugars in plants.
• Examine transverse sections: phloem appears as sieve tubes and companion cells, often near xylem in vascular bundles.
• Match diagram numbers to phloem locations (e.g., in stems, roots).
• Select row pairing phloem diagrams correctly with the function.

Why B is correct:

• Option B accurately assigns diagrams 1 and 6 to phloem (organic solute transport) based on standard plant anatomy definitions.

Why the others are wrong:

• A mispairs phloem with 1,5 and includes non-phloem in 2,3,6.
• C incorrectly groups 2,3,5 as phloem while assigning 1,4,6 to another function.
• D wrongly limits phloem to 2,4 and excludes key diagrams 1,3,5.

Not enough information: Diagrams not provided, so identification relies on typical examples.

Final answer: B