What is the level of archaebacteria?

Archaebacteria, now often referred to as archaea, are a distinct domain of life separate from bacteria and eukaryotes. They are single-celled organisms that thrive in extreme environments, such as hot springs and salt lakes, but can also be found in more common habitats. Archaea are prokaryotic, meaning they lack a nucleus and membrane-bound organelles, and they have unique biochemical and genetic characteristics that differentiate them from bacteria. They play crucial roles in various ecosystems, particularly in biogeochemical cycles.