Classification and the three-domain system Quiz
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5 questions, one answer each
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1. Which domain contains prokaryotes with peptidoglycan in the cell wall?
- A. Archaea
- B. Bacteria
- C. Eukarya
- D. Protoctista
2. Which is the main reason the species concept cannot be applied to bacteria?
- A. They are too small
- B. They have no DNA
- C. They live in extreme environments
- D. They reproduce asexually, so they do not interbreed
3. Two organisms differ at 2 of 100 bases in a gene, and two others differ at 30 of 100 bases. What is the best conclusion?
- A. The first pair is more closely related
- B. The second pair is more closely related
- C. Both pairs are equally related
- D. Nothing can be concluded about relatedness
4. Why are new molecular findings peer reviewed before the classification is changed?
- A. To make the data more expensive
- B. To increase the number of species
- C. So that other scientists can check the methods and conclusions and repeat the work
- D. To prove that the earlier system was correct
5. Which evidence led to the recognition of Archaea as a separate domain?
- A. The shape of the cells under a microscope
- B. Differences in rRNA base sequences
- C. The habitats where they live
- D. Their ability to interbreed