Unicellular Organism


Unicellular Organism (Bacteria) 

A unicellular organism is any organism that has only one cell. The main groups of these organisms are bacteria, archaea, protozoa, and unicellular algae and fungi. There are both prokaryotes and eukaryotes that are single-celled. They are also believed to be the oldest form of life, existing since about 4 billion years ago.
Fun fact! There is more bacteria in bottled water than tap water.


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