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5 Written questions

5 Matching questions

  1. Water is pulled through the xylem via what kind of pressure?
  2. What two reasons cause hydrostatic pressure become negative with a reduction of water in the soil?
  3. Bulk mass flow is sensitive to changes in what? But as long as there is little change in __ the driving force behind it is mostly affected by what?
  4. What drives xylem water transport?
  5. Specialized arrangements of what in guard cells plays a role in the opening and closing of the stomates?
  1. a adhesion and surface tension of water (more negative with increase curvature)
  2. b cellulose and microfibril
  3. c this is driven by pressure gradients
  4. d it is pulled up from the roots via a negative hydrostatic pressure
  5. e changes in radius, viscosity, concentration gradient

5 Multiple choice questions

  1. the loss of water. ~97% absorbed by plant, transported and evaporated through the leaf.
  2. Diffusion, substances move down a concentration gradient, bulk flow moves down a pressure gradient
  3. concerted movement of groups of molecules on mass. Responsible for long distance transport in the xylem and for much of the water though the soil and cell walls of plants.
  4. the ease at which the water moves through the soil (remember spaces between soil particles)
  5. the concentration of the solute and the pressure gradient

5 True/False questions

  1. What can reduce tensile strength in a water column?gas bubbles


  2. Sum up the importance of water potential:the measurement of free energy of water per unit of volume. (J/m^3)


  3. Apoplast:pathway of water moving through a network of cells connected via the plasmodesmata going to the cortex driven by hydrostatic pressure


  4. What are nucleating sites and how are the reduced?gas bubbles


  5. Water movement through soil is driven via what?into the cell walls of the mesophyll where water vapor diffuses through leaf air spaces through the stomatal pore and across the boundary layer