Protist
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A protist or protoctist is any eukaryotic organism that is not an animal, land plant, or fungus. Protists do not form a natural group, or clade, but are a paraphyletic group encompassing the entire eu
Protist collage 2
Cladococcus, a radiolarian
Naegleria, an amoeboflagellate
Gephyrocapsa, a coccoid alga
Amoeba
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An amoeba or ameba, often called an amoeboid, is a type of cell or unicellular organism with the ability to alter its shape, primarily by extending and retracting pseudopods. Amoebae do not form a sin
Protist
…eukaryote tree of life, from which land plants, animals, and fungi evolved. They are primarily single-celled, exhibiting a wide range of forms such as amoebae, ciliates, thick-walled microalgae and, more commonly, flagellates. Several transitions to multicellularity have occurred among protists, from colonies…
Clockwise from top right: Amoeba proteus, Actinophrys sol, Acanthamoeba sp., Nuclearia thermophila., Euglypha acanthophora, neutrophil ingesting bacteria.
Amoeba phagocytosis of a bacterium
Foraminifera have reticulose (net-like) pseudopods, and many species are visible with the naked eye.
Trophozoites of the pathogenic Entamoeba histolytica with ingested red blood cells