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protozoa    音标拼音: [pr,otəz'oə]
n. 原生动物类

原生动物类

Protozoa
n 1: in some classifications considered a superphylum or a
subkingdom; comprises flagellates; ciliates; sporozoans;
amoebas; foraminifers [synonym: {Protozoa}, {phylum Protozoa}]

Protozoon \Pro`to*zo"["o]n\ (-[o^]n), n.; pl. {Protozoa}. [NL.]
(Zool.)
(a) One of the Protozoa.
(b) A single zooid of a compound protozoan.
[1913 Webster]


Protozoa \Pro`to*zo"a\, n. pl. [NL., fr. Gr. ? first zo^,on an
animal.] (Zool.)
The lowest of the grand divisions of the animal kingdom.
[1913 Webster]

Note: The entire animal consists of a single cell which is
variously modified; but in many species a number of
these simple zooids are united together so as to form a
compound body or organism, as in the Foraminifera and
Vorticell[ae]. The reproduction takes place by fission,
or by the breaking up of the contents of the body after
encystment, each portion becoming a distinct animal, or
in other ways, but never by true eggs. The principal
divisions are Rhizopoda, Gregarin[ae], and Infusoria.
See also {Foraminifera}, {Heliozoa}, {Protoplasta},
{Radiolaria}, {Flagellata}, {Ciliata}.
[1913 Webster]


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  • Protozoa - Wikipedia
    Protozoa may also live as mixotrophs, combining a heterotrophic diet with some form of autotrophy Some protozoa form close associations with symbiotic photosynthetic algae (zoochlorellae), which live and grow within the membranes of the larger cell and provide nutrients to the host
  • Protozoan | Definition, Parasites, Diseases, Characteristics, Size . . .
    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 - Definition, Examples, Characteristics, and Classification
    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
  • What are Protozoa? - Microbiology Society
    What are Protozoa? 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 heterotrophs, meaning that they eat other plants or animals for energy and nutrients
  • What Are Protozoa? Definition, Characteristics, Types Examples
    Protozoa are microscopic, single-celled organisms traditionally grouped together because they resemble animals in several important ways: they generally obtain food from other organisms or organic material, can move actively, and do not have the rigid cell walls typical of plants and many algae
  • Protozoa: Structure, Classification, Growth, and Development
    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 found in almost every possible habitat
  • About Parasites | Parasites | CDC
    Protozoa are microscopic, one-celled organisms that can be free-living or parasitic in nature They are able to multiply in humans, which contributes to their survival and also permits serious infections to develop from just a single organism
  • Protozoa - Definition, Classification, Characteristics, Structure . . .
    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
  • Microbiology - Protozoa, Eukaryotes, Unicellular | Britannica
    Microbiology - Protozoa, Eukaryotes, Unicellular: 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
  • Protozoa - ScienceDaily
    Protozoa are single-celled eukaryotes (organisms whose cells have nuclei) that commonly show characteristics usually associated with animals, most notably mobility and heterotrophy





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