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Clockwise from top right: Amoeba proteus, Actinophrys sol, Acanthamoeba sp., Nuclearia thermophila., Euglypha acanthophora, neutrophil ingesting bacteria. An amoeba (/ ə ˈ m iː b ə /; less commonly spelled ameba or amœba; pl.: amoebas (less commonly, amebas) or amoebae (amebae) / ə ˈ m iː b i /), [1] often called an amoeboid, is a type of cell or unicellular organism with the ability ...
Amoeba (sometimes amœba or ameba, plural amoebae, amoebas or amebas) is a type of cell or organism which has the ability to alter its shape, primarily by extending and retracting pseudopods. Amoeba or variants may also refer to:
The m.o. view is that there were two distinct but coincident amoebae before fission, occupying the same body of matter, but which diverge upon fission into the same two distinct, but no longer coincident, amoebae. The number of amoebae hasn't increased, i.e. there were two before fission, and there are the same two after fission.
E. thermarum as an example of adaptation to extreme environments [2] suggests that the evolution of thermophily in amoebae has occurred across multiple distantly related lineages, indicating that the amoeboid form may be particularly well-suited for high-temperature environments.
The Amoebidae are a family of Amoebozoa, [1] including naked amoebae that produce multiple pseudopodia of indeterminate length. These are roughly cylindrical with granular endoplasm and no subpseudopodia, as found in other members of the class Tubulinea. During locomotion one pseudopod typically becomes dominant and the others are retracted as ...
(A) Idionectes vortex amoeboid cell (left) and flagellate (right). (B) An amoeboid cell with leptopodia, nucleus, and food inclusions. (C) Time series of locomoting amoeba. (D) Three amoebae showing the distribution of F-actin (phalloidin) in leptopodia (arrowheads) and adhesion zones (dashed circles
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Breviatea, commonly known as breviate amoebae, [3] are a group of free-living, amitochondriate protists with uncertain phylogenetic position. [4] They are biflagellate, and can live in anaerobic (oxygen-free) environments. [4] [3] [5] They are currently placed in the Obazoa clade. [6] They likely do not possess vinculin proteins. [6]