Texas Southern University - BIOL 347

Chapter 10

Identification and Classification of Prokaryotic Organisms

True / False Questions

1)The three domain systems consists of Archaea, Bacteria, Eucarya.

2. All known species of bacteria are described in Bergey's Manual of Systematic Bacteriology.

3. Size and shape may allow one to differentiate between a bacterium, fungus, or protozoan.

4. Serratia marcescens are red when incubated at 37C.

5. Streptococcus pyogenes can be easily distinguished microscopically from other Streptococcus species

6. Based on DNA hybridization, humans and chimpanzees are the same species.

7. rRNA sequence comparisons are useful for determining evolutionary relationships.

8. If each of two bacteria have a %GC of 50%, this means that they are both definitely closely related.

9. Horizontal DNA transfer may make it more difficult to construct phylogenetic trees.

10. Numerical taxonomy uses a battery of genotypic characteristics to classify bacteria.

Essay Questions

11. Which, if any, organelles might be useful in investigating evolutionary relationships?

12. Explain why two bacteria that have the same %GC are considered to be only possibly related and not definitely related?