Title: Archaea | Microbiology
Headings: Archaea
Archaea
Learning Objectives
Crenarchaeota
Think about It
Euryarchaeota
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Finding a Link Between Archaea and Disease
Key Concepts and Summary
Multiple Choice
Fill in the Blank
Think about It

Content: Some archaea, based on fossil evidence, are among the oldest organisms on earth. Archaea do not live in great numbers in human microbiomes and are not known to cause disease. Multiple Choice
Archaea and Bacteria are most similar in terms of their ________. genetics
cell wall structure
ecology
unicellular structure
Show Answer
Answer d. Archaea and Bacteria are most similar in terms of their unicellular structure. Which of the following is true of archaea that produce methane? They reduce carbon dioxide in the presence of nitrogen. They live in the most extreme environments. They are always anaerobes. They have been discovered on Mars. Show Answer
Answer b. They live in the most extreme environments.