Bacteria
Bacteria are single-celled organisms, which are composed of cells, but no human structure complex, often heading prokaryotes and colorless. Bacteria are the lowest life forms are able to synthesize protoplasm from the surrounding environment. The bacteria are usually rods (bacilli), spherical (cocci) and comma-shaped (spirilla, vibrios, spirochetes). The types of bacteria found in water often causes intestinal diseases, such as cholera (cholera, caused by Vibrio comma), typhoid (typhoid, caused by Salmonella typhosa), ...
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