What is the primary function of xylem vessels in vascular plants?

What is the primary function of xylem vessels in vascular plants?

• A. Store sugars and transport nutrients
• B. Transport water and minerals from the roots and provide support
• C. Carry out photosynthesis
• D. Transport air throughout the plant

Answer: (B)

Xylem vessels are the conduits that move water and dissolved minerals from the roots up through the plant, and their thick, lignified walls provide structural support. These vessels form a continuous, hollow column of dead cells, enabling a one-way stream driven by transpiration pull and the cohesion of water molecules, which helps lift water against gravity. This combination—upward transport of water/minerals and physical support from lignin—is the central job of xylem. In contrast, transporting sugars and nutrients is mainly the role of phloem, photosynthesis happens in chloroplasts, and xylem does not transport air.

Xylem vessels are the conduits that move water and dissolved minerals from the roots up through the plant, and their thick, lignified walls provide structural support. These vessels form a continuous, hollow column of dead cells, enabling a one-way stream driven by transpiration pull and the cohesion of water molecules, which helps lift water against gravity. This combination—upward transport of water/minerals and physical support from lignin—is the central job of xylem. In contrast, transporting sugars and nutrients is mainly the role of phloem, photosynthesis happens in chloroplasts, and xylem does not transport air.