What is the primary function of xylem in a vascular plant?

• A. Transports water and dissolved minerals from the roots to the shoots and provides structural support.
• B. Transports sugars for storage.
• C. Conducts photosynthesis.
• D. Stores water.

Answer: (A)

Xylem’s main job is to move water and dissolved minerals from the roots to every part of the plant, and its sturdy, lignified walls also provide structural support to help the plant stay upright. Water moves upward through these hollow, dead cells that form continuous tubes, aided by transpiration pull and root pressure. This vessels-and-tracheids structure is optimized for efficient one-way transport. Sugars and other nutrients travel in phloem, not xylem, and photosynthesis happens in chloroplasts within green tissues, not in xylem. So storing water isn’t the primary role of xylem; its main function is conduction and support.