Keep some freshly cut flowers in a solution of food color. Wait for some time for the dye to rise in the flower, when the stem of the flower is held up in light, colored strands can be seen inside. Can this experiment demonstrate which tissue is conducting water up the stem?
The colored strands depict that water has flowed constantly through the stem, and this is due to the forces of cohesion and adhesion. This experiment effectively demonstrates the ascent of water in the stem due to the xylem.