Protist | Definition, Characteristics, Reproduction, Examples,
2024年11月22日 · Protist, any member of a group of diverse eukaryotic, predominantly unicellular microscopic organisms. They may share certain morphological and physiological …
Protozoan | Definition, Parasites, Diseases, Characteristics, Size ...
2024年11月5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 …
Protist - Diversity, Unicellular, Microscopic | Britannica
2024年11月22日 · The great diversity of protist characteristics supports theories about the antiquity of the protists and of the ancestral role they play with respect to other eukaryotes. …
protist summary | Britannica
protist , Any member of a kingdom (Protista) of diverse eukaryotes, including algae, protozoans, and lower fungi (see fungus). Most are single-celled organisms, though the algae tend to be …
protist - Kids | Britannica Kids | Homework Help
Protozoans, algae, and slime molds belong to a group of living things called protists, or protoctists. Protists are not animals, plants, fungi, or bacteria. Many protists are so small that …
Protist - Ecology, Habitats, Diversity | Britannica
2024年11月22日 · Protist - Ecology, Habitats, Diversity: The distribution of protists is worldwide; as a group, these organisms are both cosmopolitan and ubiquitous. Every individual species, …
Algae | Definition, Characteristics, Classification, Examples, & Facts ...
2024年10月28日 · algae, members of a group of predominantly aquatic photosynthetic organisms of the kingdom Protista. Algae have many types of life cycles, and they range in size from …
Ciliate | Protists, Movement, Reproduction | Britannica
ciliate, any member of the protozoan phylum Ciliophora, of which there are some 8,000 species; ciliates are generally considered the most evolved and complex of protozoans. Ciliates are …
Protist - Nutrition, Respiration, Metabolism | Britannica
2024年11月22日 · Protist - Nutrition, Respiration, Metabolism: At the cellular level, the metabolic pathways known for protists are essentially no different from those found among cells and …
Protist - Evolution, Fossils, Eukaryotes | Britannica
2024年11月22日 · Protists are suspected to have played a key role in eukaryotic evolution. They have been implicated specifically in hypotheses of the origin of eukaryotic cells from …