Clockwise from top right:<unk>  proteus, Actinophrys sol, Acanthamoeba sp., Pompholyxophrys sp., Euglypha sp., neutrophil ingesting bacteria An<unk>  (; less commonly spelled<unk>  or amœba; plural am(o)ebas or am(o)ebae ), often called an<unk> id, is a type of cell or unicellular organism which has the ability to alter its shape, primarily by extending and retracting pseudopods.<unk> e do not form a single taxonomic group; instead, they are found in every major lineage of eukaryotic organisms.<unk> id cells occur not only among the protozoa, but also in fungi, algae, and animals. Microbiologists often use the terms "amoeboid" and<unk> " interchangeably for any organism that exhibits<unk> id movement. In older classification systems, most<unk> e were placed in the class or subphylum Sarcodina, a grouping of single-celled organisms that possess pseudopods or move by protoplasmic flow. However, molecular phylogenetic studies have shown that Sarcodina is not a monophyletic group whose members share common descent. Consequently,<unk> id organisms are no longer classified together in one group. The best known<unk> id protists are Chaos carolinense and<unk>  proteus, both of which have been widely cultivated and studied in classrooms and laboratories. Other well known species include the so-called "brain-eating<unk> " Naegleria fowleri, the intestinal parasite Entamoeba histolytica, which causes<unk> c dysentery, and the multicellular "social<unk> " or slime mould Dictyostelium discoideum.
Amoeba
Yeast
Protozoa
Spirometra
Schistocyte
Peruna 
Microgenia
Fungus