Prokaryotic cells do exist in bacteria. It lacks a nucleus as well as other membrane-bound organelles.
Bacteria are microscopic living things that may be found in abundance on our planet.
Bacteria are a large category of unicellular, microscopic living entities often known as microbes or microorganisms. Prokaryotes are tiny creatures that lack a proper nucleus and other cellular components.
Bacteriology is a field of microbiology that deals with the study of bacteria. Bacteria were discovered for the first time in 1675 by Dutch microscopist Antoine van Leeuwenhoek.