Transport Pathways in Dicotyledonous Plants

Steps:

• Identify key transport pathways: xylem for water/minerals upward, phloem for sugars bidirectional.
• Recall dicot features: vascular bundles in stems arranged in a ring, not scattered.
• Evaluate statements based on standard biology: statement 3 likely correct (e.g., phloem transport), 1 and 2 incorrect (e.g., misstating xylem direction or bundle arrangement).
• Select option matching only statement 3 as accurate.

Why D is correct:

• In dicots, phloem enables bidirectional transport of organic solutes via pressure-flow hypothesis, aligning with statement 3's description.

Why the others are wrong:

• A incorrect: Includes false statement 1, e.g., claiming xylem bidirectional.
• B incorrect: Includes false statement 1, ignoring dicot-specific vascular ring.
• C incorrect: Includes false statement 2, e.g., misdescribing root pressure role.

Not enough information on exact statements 1-3 to fully verify, but D fits typical dicot transport facts.

Final answer: D