Bacteria are microscopic, single-celled organisms that belong to the prokaryotic group¹. They are very diverse and can live in many different environments, such as soil, water, hot springs, radioactive waste and even inside other organisms¹². Bacteria play a vital role in many biological processes, such as recycling nutrients, fixing nitrogen, decomposing dead matter, producing cheese and yogurt, and making antibiotics¹²³. some bacteria can also cause diseases, such as cholera, syphilis, tuberculosis and plague¹³. Bacteria can be classified based on their shape, cell wall composition, mode of respiration and mode of nutrition²..

(1) Bacteria – Wikipedia. https://en.wikipedia.org/wiki/Bacteria.
(2) Bacteria – Definition, Structure, Diagram, Classification – BYJU’S. https://byjus.com/biology/bacteria/.
(3) What are bacteria and what do they do? – Medical News Today. https://www.medicalnewstoday.com/articles/157973.
(4) Bacteria: Definition, Types, Benefits, Risks & Examples – Cleveland Clinic. https://my.clevelandclinic.org/health/articles/24494-bacteria.