9.1

Question 1

Outline the structure of the xylem and how it is adapted to its function (5)

Answer 1

• Long continuous tubes
• of dead/hollow cells
• Cells are arranged end-to-end
• Walls are impregnated with lignin «for strength»
• Adhesion between water and the hydrophilic/negative wall of xylem
• Water is transported by transpiration stream