Eubacteria, known as "true bacteria," are prokaryotic (lacking nucleus) cells. Eubacteria are characterised by the following traits: prokaryotic, lack mitochondria or chloroplasts, have a rigid cell wall made of peptidoglycan, flagella, if present, are made of single filament of the protein flagellin, a cell membrane composed of a phospholipid bilayer that lacks cholestrol and steroids, no mitosis - mostly asexual reproduction, many eubacteria form spores, resistant to dehydration and most temperatures, when there is no food and can last up to 50 years, all eubacteria are either spirilla (spiral shaped), bacilli (rod shaped), or cocci (spherical).