Archaea I.
Archaea A. Environments 1. Very hot (thermophiles) to very cold (psychophiles). They are very resilient to other microorganisms that destroy other bacteria 1. Archaea can survive and grown in an oxygen-free environment (anaerobic) and in a high-salt (hypersaline) environment. B. Identification 1. Unique sequence of rRNA 2. Cell walls lack peptidoglycan. Contrary to bacteria which have cell walls with peptidoglycan C.