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5 Written questions

5 Matching questions

  1. What are the two main water transport processes?
  2. Water is pulled through the xylem via what kind of pressure?
  3. Water movement through soil is driven via what?
  4. What are nucleating sites and how are the reduced?
  5. Bulk mass flow:
  1. a 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.
  2. b bulk flow
  3. c molecular diffusion and bulk flow
  4. d it is pulled up from the roots via a negative hydrostatic pressure
  5. e they are sites that could provide the action energy required for water to undergo change for liquid to gas. This can occur due to gas bubbles and is avoided in the xylem via piths in water transfer which are to small for most bubbles to pass.

5 Multiple choice questions

  1. water molecule attraction to a solid such as a cell wall or a glass tube
  2. solute concentration, pressure and gravity
  3. guard cells and subsidary cells found in the dumbell shaped guard cells of monocots
  4. it is the energy used to increase the surface area, the amount of surface area occupied by the interface of air and water. this is important because remember that water is more attracted to itself then to air molecules. (This is what can create contact angels) water generally wants to minimize the surface area at the air water interface
  5. the size of the pressure gradient at the root tip and the soil near by and soil hydraulic conductivity

5 True/False questions

  1. If bulk flow is driven by pressure gradient how is it responsible for movement of water through soil?it is the energy used to increase the surface area, the amount of surface area occupied by the interface of air and water. this is important because remember that water is more attracted to itself then to air molecules. (This is what can create contact angels) water generally wants to minimize the surface area at the air water interface

          

  2. Transpiration is dependent upon what?difference in water vapor concentration in the air spaces in the leaf and the external air

          

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

          

  4. What is the difference between diffusion and bulk flow?Diffusion, substances move down a concentration gradient, bulk flow moves down a pressure gradient

          

  5. Water is pulled from the xylem into what?the measurement of free energy of water per unit of volume. (J/m^3)

          

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