archaeobacteria

Meaning

Single-celled microorganisms that constitute one of the three domains of life, genetically distinct from bacteria and eukaryotes, often found in extreme habitats.

Examples

• Scientists study archaeobacteria to understand how life might have originated in the harsh conditions of early Earth.
• The unique cell wall structure of archaeobacteria allows them to withstand the intense pressure of deep-sea hydrothermal vents.