2. Domain Bacteria
This domain bacteria and cyanobacteria. They are also prokaryotes. The cell wall is made of peptidoglycan. They are found in all environments including soil, water, air and in the bodies of organisms. They are unicellular. Many live solitary although some form chains, cluster, or colonies of cells. Most are heterotrophic but some have chlorophyll and carry out photosynthesis. This domain contains kingdom are beneficial. Example: Decomposer bacteria play important role in nutrient recycling.
All data collected from my book of Biology.