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is a virus a unicellular organism?
are all unicellular organisms bad for humans to be in contact with
Biology - Unicellular organisms
Organisms that are composed of a single cell are called unicellular
Not all unicellular  organisms are the same. There are a huge number of
ways that a unicellular organism can get food and move around.
A large number of unicellular organisms live in water. Organisms that live
in water are called aquatic. 
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