Thread: Longest lived empires/states in history. 1 out of 1 members found this post helpful. Many lists have been written about the most long-lived empires or states in the history of mankind and oddly enough nobody seems to agree on the ranking.
E. coli is a Gram-negative (bacteria which do not retain crystal violet dye), facultative anaerobic (that makes ATP by aerobic respiration if oxygen is present, but is capable of switching to fermentation or anaerobic respiration if oxygen is absent) and nonsporulating bacterium.
Escherichia coli is a rod-shaped bacterium. Each bacterium measures approximately 0.5 Î¼m in width by 2 Î¼m in length. E. coli is a Gram-negative bacterium. E. coli cells stain Gram negative because they have a thin cell wall with only 1 to 2 layers of peptidoglycan. E. coli is a facultative anaerobe, which means it does not require oxygen, but grows better in the presence of oxygen.