Meiotic sex is widespread among eukaryotes, and must have originated early in their evolution, as it has been found in many protozoan lineages that diverged early in eukaryotic evolution.

Dec 17, 2025 · 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 …

Protozoa are micro-organisms which have a membrane bound nucleus that can't be categorised as a fungi, animal or plant. Most protozoa are free living, but some are parasitic. They are …

Oct 19, 2025 · Protozoa are tiny, single-celled organisms that can cause diseases like malaria, giardia, and toxoplasmosis. Protozoan infections can be identified through blood, stool tests, …

Jul 30, 2025 · What are Protozoan Parasites? Protozoan parasites are distinct from bacteria and viruses because they possess a complex internal structure typical of eukaryotic cells, including …

Aug 3, 2023 · Protozoans exhibit mainly two forms of life; free-living (aquatic, freshwater, seawater) and parasitic (ectoparasites or endoparasites). They are also commensal in habitat. …

The meaning of PROTOZOAN is any of a phylum or subkingdom (Protozoa) of chiefly motile and heterotrophic unicellular protists (such as amoebas, trypanosomes, sporozoans, and …

Protozoa are unicellular eukaryotic microorganisms lacking a cell wall and belonging to the Kingdom Protista. The vegetative, reproducing, feeding form of a protozoan is called a …

Protozoan is defined as a polyphyletic group of single-celled heterotrophic organisms belonging to various phyla in the Kingdom Protista, exhibiting diverse morphologies, reproductive methods, …

Dec 4, 2025 · Protozoan cells contain the typical internal structures of an animal cell. Some can swim through water by the beating action of short, hairlike appendages (cilia) or flagella.