Review Questions

4. For an element to be regarded as essential, all of the following criteria must be met, except:

  1. No other element can perform the function.
  2. The element is directly involved in plant nutrition.
  3. The element is inorganic.
  4. The plant cannot complete its lifecycle without the element.

5. The nutrient that is part of carbohydrates, proteins, and nucleic acids, and that forms biomolecules, is ________.

  1. nitrogen
  2. carbon
  3. magnesium
  4. iron

6. Most ________ are necessary for enzyme function.

  1. micronutrients
  2. macronutrients
  3. biomolecules
  4. essential nutrients

7. What is the main water source for land plants?

  1. rain
  2. soil
  3. biomolecules
  4. essential nutrients

8. Which factors affect soil quality?

  1. chemical composition
  2. history of the soil
  3. presence of living organisms and topography
  4. all of the above

9. Soil particles that are 0.1 to 2 mm in diameter are called ________.

  1. sand
  2. silt
  3. clay
  4. loam

10. A soil consists of layers called ________ that taken together are called a ________.

  1. soil profiles : horizon
  2. horizons : soil profile
  3. horizons : humus
  4. humus : soil profile

11. What is the term used to describe the solid rock that lies beneath the soil?

  1. sand
  2. bedrock
  3. clay
  4. loam

12. Which process produces an inorganic compound that plants can easily use?

  1. photosynthesis
  2. nitrogen fixation
  3. mycorrhization
  4. Calvin cycle

13. Through mycorrhization, a plant obtains important nutrients such as ________.

  1. phosphorus, zinc, and copper
  2. phosphorus, zinc, and calcium
  3. nickel, calcium, and zinc
  4. all of the above

14. What term describes a plant that requires nutrition from a living host plant?

  1. parasite
  2. saprophyte
  3. epiphyte
  4. insectivorous

15. What is the term for the symbiotic association between fungi and cyanobacteria?

  1. lichen
  2. mycorrhizae
  3. epiphyte
  4. nitrogen-fixing nodule

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Biology 2e for Biol 111 and Biol 112 Copyright © 2023 by Mary Ann Clark; Jung Choi; and Matthew Douglas is licensed under a Creative Commons Attribution 4.0 International License, except where otherwise noted.

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