Animal-Like Protista. Introduction Protists are eukaryotes and include unicellular (e.g., amoeba) and multicellular forms (e.g., algae). Filamentous algae. Eukaryotic cell. The word protista (Gr. protos , very first, ktistos, to establish) implies great antiquity
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1.Toward multicellular forms such as cyanobacteria; different cell types with specialized functions
2. The compartmentalization of different functions within cells; the first eukaryotes resulted from this solution
2. Endosymbiotic associations of prokaryotes may have resulted in the appearance of some organelles. Mitochondria, chloroplasts, and some other organelles evolved from prokaryotes living within other prokaryotic cells