This preview shows page 1. Sign up to view the full content.
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...
View Full Document
- Spring '08