Archaebacteria are a group of prokaryotic organisms that live in extremely harsh conditions. They are different from Eubacteria because of the following reasons:
- They are mostly anaerobic
- The RNA of their ribosomes is different to that of Eubacteria.
- They have no peptidoglycan in their cell walls
- Their fats are linked together in a different way
They can be found in marshes, such as one shown in the photograph.