How is bacteria and archaea different from eukarya?

Bacteria and archaea are prokaryotic organisms, meaning they lack a defined nucleus and membrane-bound organelles, while eukarya are eukaryotic, characterized by their complex cells with a nucleus. Additionally, bacteria and archaea have distinct cell wall compositions; bacteria typically have peptidoglycan, while archaea possess unique cell wall materials. Their genetic machinery and metabolic pathways also differ significantly, with archaea often found in extreme environments and exhibiting unique biochemical processes.