Chapter 37 Review: Soil and Plant Nutrition

  1. Rhizobium live within ________ of root cells.
    1. bacteroids <==== correct
    2. viroids (wrong)
    3. ovoids (wrong)
    4. plastoids (wrong)
    5. roboids. (wrong)
      Hint
  2. Which of these is NOT an essential macronutrient?
    1. Carbon (wrong)
    2. Oxygen (wrong)
    3. Hydrogen (wrong)
    4. Nitrogen (wrong)
    5. Molybdenum <==== correct
      Hint
  3. What are the three main elements on which plant growth and development depend?
    1. nitrogen; carbon; oxygen (wrong)
    2. potassium; carbon; oxygen (wrong)
    3. oxygen; carbon; hydrogen <==== correct
    4. phosphorus; nitrogen; oxygen (wrong)
    5. sulfur; nitrogen; phosphorus (wrong)
      Hint
  4. A type of mycorrhizae in which the fungal mycelium forms a mantle over the surface of the root is called
    1. endomycorrhizae. (wrong)
    2. ectomycorrhizae. <==== correct
    3. exoomycorrhizae. (wrong)
    4. epimycorrhizae. (wrong)
    5. intermycorrhizae. (wrong)
      Hint
  5. Which soil horizon contains the most organic matter (humus)?
    1. A <==== correct
    2. B (wrong)
    3. C (wrong)
    4. D (wrong)
    5. E (wrong)
      Hint
  6. Plants release CO2 to obtain minerals from soil in a process called
    1. cation exchange. <==== correct
    2. anion exchange. (wrong)
    3. acid exchange. (wrong)
    4. acid condensation. (wrong)
    5. mineral hydration. (wrong)
      Hint