Wize University Biology Textbook > Prokaryotes
Diversity of Archaea
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Diversity of Prokaryotes
- Two Domains
- Archaea
- Closest relative to Eukaryotes
- Bacteria
- Most well known prokaryotes
Archaea
- Latin "Arch" = ancient
- Lack peptidoglycogen
Exam Tip
Understanding the meaning and roots of words is called Etymology. Knowing the translation makes it much easier to remember the terms on an exam. Throughout this textbook I will give etymology where applicable to help you understand the reason for these Latin names
Extremophiles
Extremophiles: live in extreme environments
- Greek "philos" = to love
- Many are in archaea, though present in all three domains
- Halophiles: live in extremely salty environments
- Greek "Halo" = salt
- Not always table salt, can be any ionic compound
- Thermophiles: live in extreme heat
- Greek "Thermo" = hot
- Used to develop PCR
- Methanogens: produce methane as waste product
- live in environments without oxygen
Practice: Archaea
Which term refers to organisms that live in very salty environments?