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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.
Apr 10, 2024 · Protozoan is an informal term for nonfilamentous heterotrophic protists, such as amoebas, paramecia, and dinoflagellates. Learn about their diversity, evolution, ecology, and diseases from Britannica's experts.
Apr 28, 2017 · Protozoa are single-celled eukaryotes that belong to the Domain Eukarya. They have different phyla, such as Euglenida, Kinetoplastida, Ciliophora, Apicomplexa and Dinoflagellata. Some protozoa are parasites that cause diseases, while others are photosynthetic and produce sugars. Learn more about their characteristics, examples and functions.
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.
- Robert G. Yaeger
- 1996
- 1996
Aug 3, 2023 · Protozoa are unicellular eukaryotic microorganisms with a membrane-bound nucleus and other organelles. They exist in various aquatic and terrestrial environments worldwide, and some are parasites or free-living. Learn about their cell size, structure, movement, habitat, feeding, nutrition, and adaptations.
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Oct 14, 2022 · Learn about protozoa, a group of single-cell organisms that can cause diseases like malaria, giardia, and toxoplasmosis. Find out how to diagnose and treat these infections and prevent their spread.
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).
