Protozoan | Definition, Parasites, Diseases, Characteristics, Size ...
网页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.
Protozoa - Wikipedia
网页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.
Protozoa - Definition, Types and Examples - Biology Dictionary
网页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.
Protozoa: Structure, Classification, Growth, and Development
网页Protozoa are microscopic unicellular eukaryotes that have a relatively complex internal structure and carry out complex metabolic activities. Some protozoa have structures for propulsion or other types of movement. Classification. On the basis of light and electron microscopic morphology, the protozoa are currently classified into six phyla.
Protozoa - Definition, Examples, Characteristics, and Classification
网页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.
Protozoan - Cell Structure, Nutrition, Reproduction | Britannica
网页Protozoan - Cell Structure, Nutrition, Reproduction: The protozoan cell carries out all of the processes—including feeding, growth, reproduction, excretion, and movement—necessary to sustain and propagate life. The cell is enclosed in a …
Microbiology - Protozoa, Eukaryotes, Unicellular | Britannica
网页2024年9月19日 · 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. Cells can be as small as 1 μm in diameter and as large as 2,000 μm, or 2 mm (visible without magnification).
8.4: Protozoa - Biology LibreTexts
网页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 …
Protozoa - Biology Encyclopedia - cells, body, examples, function ...
网页Protozoa (meaning "first animals") are heterotrophic, single-celled or colonial eukaryotes. Individuals are microscopic and range in size from a few to hundreds of micrometers, depending on the species.
19.1: Protozoans - Biology LibreTexts
网页2023年12月31日 · Protozoans are unicellular eukaryotic microorganisms belonging to the Kingdom Protista. They reproduce asexually by fission (one cell splits into two), schizogony (multiple fission; the nucleus divides many times and the nuclei are separated into daughter cells), or budding (pinching off of a bud from a parent cell).