Plants

• What is transpiration?

  Evaporation of water from the surface of plant leaves
• Where does water vapor exit the plant?

  Stomata
• What type of cells control the opening of stomata?

  Guard cells
• Cohesion in plants is causes by polar covalent bonds. Positive and negative charged ends of a water molecules stick to each other like a magnet.
• How are water molecules carried through the xylem of a plant?

  In long chains
• Adhesion in plant is the attraction of water to the cellulose found in plant cell walls. Allows water molecules to be drawn up the sides of xylem.
• Transpirations causes..?

  Water molecules to experience a upward "pull" effect
• Osmosis is the movement of water molecules from a region of high water concentration to a region of low water concentration
• Osmosis and diffusion work based on concentration gradients