Protozoa
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Protozoa are a polyphyletic group of single-celled eukaryotes, either free-living or parasitic, that feed on organic matter such as other microorganisms or organic debris. Historically, protozoans wer
Clockwise from top left: Blepharisma japonicum, a ciliate; Giardia muris, a parasitic flagellate; Centropyxis aculeata, a testate (shelled) amoeba; Peridinium willei, a dinoflagellate; Chaos carolinense, a naked amoebozoan; Desmarella moniliformis, a choanoflagellate
Class Protozoa, order Infusoria, family Monades by Georg August Goldfuss, c. 1844
John Hogg's illustration of the Four Kingdoms of Nature, showing "Primigenal" as a greenish haze at the base of the Animals and Plants, 1860
Frederick Chapman's The foraminifera: an introduction to the study of the protozoa (1902)
Eukaryote
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The eukaryotes are cellular organisms of the domain Eukaryota or Eukarya, which have a distinct cell nucleus, membrane-bound organelles and organization supported by a cytoskeleton. Extant eukaryotes
Protozoa
…Protozoa (sing.: protozoan or protozoon; alternative plural: protozoans) are a polyphyletic group of single-celled eukaryotes, either free-living or parasitic, that feed on organic matter such as other microorganisms or organic debris. Historically, protozoans were regarded…
Rhodomonas salina CCMP 322
Ranunculus asiaticus 4LEST
Two Euglena
Leocarpus fragilis 10649909