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Protozoa. 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".
May 25, 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. They also are nonfilamentous (in contrast to ...
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. The fossil record in the form of shells in sedimentary rocks shows that protozoa were present in the Pre ...
- Robert G. Yaeger
- 1996
- 1996
Apr 28, 2017 · The name “protozoa” has a dynamic history, at one time including only the “animal-like” unicellular forms of life. Today, these heterotrophic protozoa are lumped together with the autotrophic algae and other simple forms of life into the Kingdom Protista. While all protozoa are eukaryotes, not all reproduce with the standard model of ...
Oct 14, 2022 · Infections caused by protozoa can spread through ingesting cysts (the dormant life stage), sexual transmission, or through insect vectors (insects that transmit diseases through bites or stings). Protozoa cause some common and some uncommon infections. Some of these infections cause illness in millions of people each year; other diseases are rare.
Aug 3, 2023 · Protozoa. The Protozoa is a subkingdom of the kingdom Protista. However, in the classical system, they were placed in the kingdom Animalia. Protozoa are unicellular eukaryotic microorganisms having a membrane-bound nucleus and other organelles within their cells. Despite their small size, they are incredibly diverse and exist in various aquatic ...
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Protozoa Classification and Examples. 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: 1. Mastigophora or Flagellated protozoans: They are parasites or free-living. They have flagella for locomotion
