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5 Written Questions

5 Matching Questions

  1. There has to be tugur pressure to up hold the cell walls unless you are very ___.
  2. What constitutes your stomatal complex?
  3. What two driving forces drive the direction and rate of water potential gradients?
  4. What properties of water generates the physical forces to pull water up through the plant?
  5. If bulk flow is driven by pressure gradient how is it responsible for movement of water through soil?
  1. a surfaces tension and adhesion at the evaporative surfaces of leaves
  2. b lignified
  3. c pressure is created by water via curvatures, water is going to want to move to areas of larger spaces with smaller curvatures
  4. d the concentration of the solute and the pressure gradient
  5. e guard cells and subsidary cells found in the dumbell shaped guard cells of monocots

5 Multiple Choice Questions

  1. this is driven by pressure gradients
  2. It is the formation of vapor/ gas bubble in flowing water which can rapidly collapse and produce shock waves provding energy to nucleating sites within the xylem.
  3. the cohesion and adhesion properties of water make the liquid to vapor activation high in water, within the xylem the energy is not available to under go the change
  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 positive hydrostatic pressure

5 True/False Questions

  1. What is the pit membrane of the xylem and why is it important to water transfer?this is a porous layer between the 2 pit pairs, made of 2 primary walls and a middle lamella. This membrane helps to prevent the spreading of gas bubbles within the xylem

          

  2. Fisk's first law: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.

          

  3. What is molecular diffusion?the loss of water. ~97% absorbed by plant, transported and evaporated through the leaf.

          

  4. What is emboli?It is the formation of vapor/ gas bubble in flowing water which can rapidly collapse and produce shock waves provding energy to nucleating sites within the xylem.

          

  5. What 3 properties of water create __ which is important for plants?surface tension, adhesion and cohesion. the capillarity of a liquid

          

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