· Bacteria are simplest (unicellular), primitive, prokaryotic organisms. · They are ubiquitous (found everywhere). · Smallest living organism with the cell wall. · Bacteria are simplest (unicellular), primitive, prokaryotic organisms. · Prokaryotic unicellular organisms included in kingdom monera. Classification of Kingdom Monera. · Microscopic, unicellular small prokaryotic organism with an average diameter of about 1 mm. · The exhibit autotrophic, saprophytic, and parasitic modes of life (heterotrophic). · Rainwater is free from bacteria. · Study of bacteria is Bacteriology. · Bacterial genome consists of both types of nucleic acid i.e. DNA and RNA. · 70 S (50 S + 30 S) Ribosomes are present. · The plasma membrane of bacteria has a finger-like infolding called mesosome . Mesosome is the site of respiration in bacteria and it also helps in equal distribution of genetic material during binary fission. · Though some bacteria are photosynthetic their cells possess bacteriochlor...