Chapter 4 Review: Secrets of the Soil

  1. An insect may possess all of the following EXCEPT:
    1. exoskeleton (wrong)
    2. cephalothorax <==== correct
    3. antennae (wrong)
    4. 6 legs (wrong)
    5. brain (wrong)
      Hint
  2. Which soil horizon is the topsoil?
    1. A <==== correct
    2. B (wrong)
    3. C (wrong)
    4. D (wrong)
    5. E (wrong)
      Hint
  3. What is the mutualistic association between roots and fungi called?
    1. carbon fixation (wrong)
    2. nitrogen fixation (wrong)
    3. mycorrhizae <==== correct
    4. rhizome (wrong)
    5. root hair enhancement (wrong)
      Hint
  4. The diagram at right illustrates a
    1. tuber (wrong)
    2. rhizome (wrong)
    3. stolon (wrong)
    4. taproot (wrong)
    5. fibrous root <==== correct
      Hint
  5. A mollisol has a thick, dark ________ horizon.
    1. A <==== correct
    2. B (wrong)
    3. C (wrong)
    4. D (wrong)
    5. E (wrong)
      Hint
  6. The dark color of prairie soils is due to
    1. rich organic matter <==== correct
    2. too much clay (wrong)
    3. too much sand (wrong)
    4. low calcium content (wrong)
    5. volcanic bedrock (wrong)
      Hint
  7. What is the order of soil moisture content, from driest to wettest?
    1. hydric, mesic, xeric (wrong)
    2. xeric, hydric, mesic (wrong)
    3. mesic, hydric, xeric (wrong)
    4. xeric, mesic, hydric <==== correct
    5. hydric, xeric, mesic (wrong)
      Hint
  8. Horizontal stems that grow just below the surface are called
    1. bulbs (wrong)
    2. rhizomes <==== correct
    3. stolons (wrong)
    4. tubers (wrong)
    5. roots (wrong)
      Hint