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Any of various tiny unicellular [[aquatic]] or [[parasite|parasitic]] [[organism]]s. They are classified as [[protozoa]]ns of the [[genus]] '''Amoeba''' or related genera. They have no solid form, instead consisting of a mass of [[protoplasm]] containing one or more [[nuclei]] surrounded by a flexible outer [[membrane]]. It moves by means of [[pseudopod]]s. Some amoeba are parasites that cause amoebic dysentery. According to the Colonial Theory<ref>

'''Amoebas''' are varied tiny unicellular [[aquatic]] or [[parasite|parasitic]] [[organism]]s. They are classified as [[protozoa]]ns of the [[genus]] '''Amoeba''' or related genera. They have no solid form, instead consisting of a mass of [[protoplasm]] containing one or more [[nuclei]] surrounded by a flexible outer [[membrane]]. It moves by means of [[pseudopod]]s. Some amoeba are parasites that cause amoebic dysentery. According to the Colonial Theory<ref>

John O. Corliss: Systematic Zoology, Vol. 8, No. 4 (Dec., 1959), pp. 169-190</ref>, in evolution history, amoeba-like organisms are believed to have contributed to the origin of multicellular organisms by clumping together to form colonies during food shortage, and eventually differentiating into various types of cells to give rise to the first multicellular organisms.

John O. Corliss: Systematic Zoology, Vol. 8, No. 4 (Dec., 1959), pp. 169-190</ref>, in [[evolution]] history, amoeba-like organisms are believed to have contributed to the origin of multicellular organisms by clumping together to form colonies during food shortage, and eventually differentiating into various types of cells to give rise to the first multicellular organisms.

==References==

==References==