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.

2025年1月17日 · 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.

2017年4月28日 · 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. Although the different phyla of the kingdom Protista are not closely related, they are nonetheless classified together because of their large differences from the other kingdoms ...

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 …

2023年8月3日 · 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 and terrestrial environments worldwide. More than 50,000 species are known, most of which are free-living organisms.

2024年10月1日 · Protozoa are a diverse group of single-celled eukaryotic organisms that can be either free-living or parasitic. They primarily feed on organic matter, including microorganisms and organic debris. Protozoa are characterized by their lack of a rigid cell wall, motility, and heterotrophic feeding habits.

2024年9月20日 · Protozoa are unicellular organisms belonging to the kingdom Protista. They are microscopic, diverse, and often found in aquatic environments. Protozoa can move using cilia, flagella, or pseudopodia, and they play essential roles in nutrient cycling and as predators of bacteria. Some protozoa are parasitic and can cause diseases in humans and ...

Protozoa are unicellular, heterotrophic, eukaryotic organisms comprising four organization types: amebae, flagellates, ciliates, and parasitic sporozoans. About 1600 species, of which some are restricted to certain geographic regions, are known to live in terrestrial habitats; however, at least the same number is still undiscovered.

2024年10月20日 · Protozoa, as single-celled eukaryotes, possess a complex cellular architecture that supports their functions and adaptability. Central to their structure is the nucleus, housing the organism’s genetic material. This organelle can vary in …

2019年12月6日 · Protozoans (Protozoa) are unicellular and heterotrophic organisms that feed on organic matter like other microorganisms or organic tissues or debris. They belong to the protist group and are typically microscopic.