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Protozoa ( sg.: protozoan or protozoon; alternative plural: protozoans) are a polyphyletic group of single-celled eukaryotes, either free-living or parasitic, that feed on organic matter such as other microorganisms or organic debris. [1] [2] Historically, protozoans were regarded as "one-celled animals".
The Protozoa are considered to be a subkingdom of the kingdom Protista, although in the classical system they were placed in the kingdom Animalia. More than 50,000 species have been described, most of which are free-living organisms; protozoa are found in almost every possible habitat.
Jul 15, 2024 · protozoan, organism, usually single-celled and heterotrophic (using organic carbon as a source of energy), belonging to any of the major lineages of protists and, like most protists, typically microscopic. All protozoans are eukaryotes and therefore possess a “true,” or membrane-bound, nucleus.
Aug 3, 2023 · More than 50,000 species are known, most of which are free-living organisms. Some common examples of protozoa are Amoeba proteus, Paramecium caudatum, Euglena gracilis, Plasmodium falciparum, and Trypanosoma brucei.
Apr 28, 2017 · Organisms known as protozoa include a wide range of organisms, most of which are free-living single-celled eukaryotes. Therefore, protozoa fit into the Domain Eukarya.
Protozoa is a phylum having unicellular heterotrophs. It comes under Kingdom Protista. Protozoa are divided into four major groups based on the structure and the part involved in the locomotion:
Protozoa are single celled organisms. They come in many different shapes and sizes and live in a wide variety of moist habitats including fresh water, marine environments and the soil.
Jun 24, 2024 · Microbiology - Protozoa, Eukaryotes, Unicellular: Protozoa, or protozoans, are single-celled, eukaryotic microorganisms. Some protozoa are oval or spherical, others elongated. Still others have different shapes at different stages of the life cycle.
protozoan , Any of a group of small (usually microscopic) single-celled protist s that are nonfilamentous and heterotrophic (using organic carbon as a source of energy). They are found in most soils, fresh water, and oceans. While most are solitary individuals, various colonial forms exist.
Animal-like protists are commonly called protozoa (singular, protozoan). Most protozoa consist of a single cell. They are animal-like because they are heterotrophs, and are capable of moving. Although protozoa are not animals, they are thought to be the ancestors of animals.
