Biology 172 Quiz 8

  1. A plant cell immersed in pure water and at osmotic equilibrium will have a net water potential of
    0 MPa
  2. A water molecule could move all the way through a plant from soil to root to leaf to air and pass through a living cell only once. This living cell would be a part of which structure?
    the endodermis
  3. Guard cells are the only cells in the epidermis that contain chloroplasts and can undergo photosynthesis. This is important because
    ATP is required to power proton pumps in the guard cell membranes.
  4. Phloem transport of sucrose can be described as going from "source to sink." Which of the following would not normally function as a sink? 

    C. mature leaf
  5. Root hairs are most important to a plant because they 

    E. increase the surface area for absorption.
  6. The value for ψ in root tissue was found to be -0.15 MPa. If you take the root tissue and place it in a 0.1 M solution of sucrose (ψ = -0.23), net water flow would

    C. be from the tissue into the sucrose solution.
  7. Transpiration in plants requires all of the following except

    A. active transport through xylem cells.
  8. Which of the following would NOT contribute to water uptake by a plant cell? 

    C. an increase in tension on the surrounding solution
  9. A soil well suited for the growth of most plants would have all of the following properties except

    B. a high pH.
  10. Carnivorous plants have evolved mechanisms that trap and digest small animals. The products of this digestion are used to supplement the plant's supply of 

    C. minerals.
  11. Nitrogen fixation is an important process for plants because it

    B. converts molecular nitrogen (N2) into forms of nitrogen that plants can use
  12. Symbiotic fungal filaments that increase the absorptive surface area of roots contribute to the formation of 

    A. mycorrhizae
  13. The N-P-K percentages on a package of fertilizer refer to the 

    A. percentages of three important mineral nutrients.
  14. Which of the following is a conservation practice that may be employed to minimize soil erosion in agriculture?

    B. all of these
  15. Which of the following macronutrient of plants is commonly deficient and needs to be added to the soil for healthy plant growth?

    C. nitrogen
  16. At low soil pH levels (5 or less), what can happen?
    Toxic aluminum ions become more available, stunting the plant's growth.
Card Set
Biology 172 Quiz 8
Plant transport process, plant nutrition