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'''Protozoa''' (singular: protozoan) are unicelluar [[eukaryote|eukaryotic]] [[organism|organisms]]. Protozoa are unlike classic [[bacteria]] (prokaryotes), which do not contain nuclei or membrane-bound organelles, and [[metazoa]] (multicellular organisms), which are conglomerates of many eukaryotic cells.

'''Protozoa''' (singular: protozoan) are unicelluar [[eukaryote|eukaryotic]] [[organism]]s. Protozoa are unlike classic [[bacteria]] (prokaryotes), which do not contain nuclei or membrane-bound organelles, and [[metazoa]] (multicellular organisms), which are conglomerates of many eukaryotic cells.

Protozoa are the most abundant life forms on [[Earth]], in number <i>and</i> biomass.<ref>http://www-biol.paisley.ac.uk/Courses/Tatner/biomedia/units/prot1.htm</ref>

Protozoa are the most abundant life forms on [[Earth]], in number <i>and</i> biomass.<ref>http://www-biol.paisley.ac.uk/Courses/Tatner/biomedia/units/prot1.htm</ref>