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Domains of Life Quiz Answer Key 1. True or False: Eukarya is separated from the other domains by the presence of a nucleus in their cells. true 2. True or False: Eukarya is composed of only multicellular organisms. false 3. What are the three domains of life? Bacteria, Archaea, and Eukarya 4. Which domains have members with membrane-enclosed organelles? Only Eukarya has species with membrane-âenclosed organelles in their cells. 5. What distinguishes Bacteria from Archaea? Archaea have a different cell wall from bacteria. Students may add that Archaea also often live in extreme environments. 6. Microscopic single-celled protists are members of which domain? a) Bacteria b) Archaea c) Eukarya d) Protista 7. Which is not a member of domain Eukarya? a) a maple tree b) a Portobello mushroom c) a blue whale d) a Spirochaete 8. Which of the following capture energy by photosynthesis? a) a maple tree b) a Portobello mushroom c) a blue whale d) all of the above 9. Which of the following absorb their nutrients from other organisms? a) a maple tree b) a Portobello mushroom c) a blue whale d) all of the above 10. If you find a single-celled organism living in a geyser, it probably belongs to which domain? a) Bacteria b) Archaea c) Eukarya d) Geyseria