Beneficial Prokaryotes

Review Questions

Which of these occurs through symbiotic nitrogen fixation?

  1. The plant benefits from using an endless source of nitrogen.
  2. The soil benefits from being naturally fertilized.
  3. Bacteria benefit from using photosynthates from the plant.
  4. All of the above occur.

Hint:

D

Synthetic compounds found in an organism but not normally produced or expected to be present in that organism are called _____.

  1. pesticides
  2. bioremediators
  3. recalcitrant compounds
  4. xenobiotics

Hint:

D

Bioremediation includes _____.

  1. the use of prokaryotes that can fix nitrogen
  2. the use of prokaryotes to clean up pollutants
  3. the use of prokaryotes as natural fertilizers
  4. All of the above

Hint:

B

In addition to providing yogurt with its unique flavor and texture, lactic acid-producing bacteria also provide which additional benefit during food production?

  1. Providing xenobiotics
  2. Lowering the pH to kill pathogenic bacteria
  3. Pasteurizing milk products
  4. Breaking down lactose for lactose-intolerant individuals

Hint:

B