Transport of water from roots to leaves

• Cohesion + adhesion + root pressure = cohesion-tension theory
• Define the term 'cohesion'.?

  Attraction of water molecules for each other, seen as hydrogen bonds, resulting from the dipole structure of the water molecule
• Define the term 'adhesion'.?

  Attraction between water molecules and hydrophyllic molecules in the cell walls of the xylem
• Define the term 'capillarity'.?

  The movement of water up narrow tubes by capillary action
• Define the term 'root pressure'.?

  The upward force on water in roots, derived from osmotic movement of water into the root xylem
• Explain what the cohesion-tension theory is.?

  The theory of the mechanism by which water moves up the xylem, as a result of the cohesion and adhesion of water molecules and the tension in the water column, all resulting from water's dipole structure