Question

Describe briefly the three physical properties of water which helps in ascent of water in xylem.

Answer 1

Following are the three physical properties of water that help in the ascent of water in the xylem.

• Cohesion: It is the ability of water molecules to stick to each other.
• Adhesion: It is the ability of water molecules to stick to a surface.
• Surface Tension: The property of any liquid that tends to occupy the smallest possible surface area is called surface tension. Water makes a continuous column of water in the xylem vessels by adhesion cohesion and surface tension. Transpiration pull pulls this water as a column.