Unformatted text preview: prokaryotes • Distinguish, with prokaryotic examples, among photoautotrophs, chemoautotrophs, photoheterotrophs, and chemoheterotrophs. • Distinguish among obligate aerobes, facultative anaerobes, and obligate anaerobes. • Explain the importance of nitrogen fixation to life on Earth. • Describe the specializations for nitrogen fixation in a filamentous colony of the cyanobacterium Anabaena . Concept 27.4: Molecular systematics is illuminating prokaryotic phylogeny • List the three domains of life. • Describe the distinguishing characteristics of the following major groups of Bacteria: o Proteobacteria o Chlamydias o Spirochetes o Gram-positive bacteria o Cyanobacteria • Explain why some Archaea are known as extremophiles. Describe the distinguishing features of methanogens, extreme halophiles, and extreme thermophiles...
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- Spring '08
- Bacteria, prokaryotic cell walls, prokaryotic genomes differs