what are the general characteristics of kingdom protista?
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Protists are eukaryotes, which means their cells have a nucleus and other membrane-bound organelles. Most, but not all, protists are single-celled. Other than these features, they have very little in common. You can think about protists as all eukaryotic organisms that are neither animals, nor plants, nor fungi.
644713
On what basis are the living organisms divided in the five-kingdom classification? The living organisms are divided into five different kingdoms – Protista, Fungi, Plantae, Animalia, and Monera on the basis of their characteristics such as cell structure, mode of nutrition, mode of reproduction and body organization.
589489
There are four types of eukaryotes: animals, plants, fungi, and protists. Protists are a group of organisms defined as being eukaryotic but not animals, plants, or fungi; this group includes protozoa, slime molds, and some algae.
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['They are non-motile.', 'They usually reproduce sexually.', 'They follow the autotrophic mode of nutrition.', 'These are multicellular eukaryotes with cell wall and vacuoles.', 'These contain photosynthetic pigments called chlorophyll in the plastids.']
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Protists are single-celled and usually move by cilia, flagella, or by amoeboid mechanisms. There is usually no cell wall, although some forms may have a cell wall. They have organelles including a nucleus and may have chloroplasts, so some will be green and others won't be.
768506
Characteristics of Unicellular Organisms They can be eukaryotes or prokaryotes. They are found in almost all habitats, from hot springs to frozen tundra. They possess whip-like structures for movement. The nutrients enter or leave the cell by the process of diffusion.
1090199
These are small eukaryotes. A eukaroytic organism can be unicellular or multicellular; most (but not all) protists are actually unicellular. Unlike bacteria, protists have specialized organelles, including a true nucleus confined by a nuclear membrane. This compartmentalization differentiates protists from bacteria.
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['These organisms are multicellular, eukaryotic and without chlorophyll.', 'The cells possess no cell walls and plastids.', 'Central vacuoles are absent but small vacuoles may occur.', 'Most of them are free moving (except sponges and some coelentrates)', 'Nutrition is primarily ingestive.']
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Most protists are single celled like bacteria, but protist are eukaryotic and have membrane bound organelles. Bacteria and archaea are single-celled, but their lack of a nucleus makes them prokaryotic and they lack membrane bound organelles. At one time, scientists grouped all single-celled organisms together.
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['Bacteria and archaea are in the Kingdom Prokaryotae (or Monera)', 'Algae and protozoa are in the Kingdom Protista (organisms in this kingdom are referred to as protists)', 'Fungi are in the Kingdom Fungi.', 'Plants are in the Kingdom Plantae.', 'Animals are in the Kingdom Animalia.']
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Protozoa are unicellular eukaryotic microorganisms lacking a cell wall and belonging to the Kingdom Protista. Protozoa reproduce asexually by fission, schizogony, or budding. Some protozoa can also reproduce sexually. Relatively few protozoa cause disease.
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Protists are a large group of unicellular organisms. As eukaryotes, they have a true nucleus with a membrane. They are all single-celled, though they may sometimes come together to form colonies. Protist cells can be distinguished from plant, animal and fungal cells by their ability to move on their own.
1037507
Characteristics of Protists A eukaroytic organism can be unicellular or multicellular; most (but not all) protists are actually unicellular. Unlike bacteria, protists have specialized organelles, including a true nucleus confined by a nuclear membrane. This compartmentalization differentiates protists from bacteria.
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['They are planktonic. ... ', 'They are small. ... ', 'They are motile. ... ', 'Many are thecate, having an internal skeleton of cellulose-like plates. ... ', 'Their chromosomes are always condensed. ... ', 'Not all dinoflagellates are photosynthetic.']
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In contrast to prokaryotic cells, eukaryotic cells are highly organized. Bacteria and archaea are prokaryotes, while all other living organisms — protists, plants, animals and fungi — are eukaryotes. Many diverse organisms including algae, amoebas, ciliates (such as paramecium) fit the general moniker of protist.
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Disadvantages of Five Kingdom Classification But similar organisms must be put together. There is diversity in kingdom Protista. Dissimilar organisms must not be kept in same group. All organisms other than moneran shows that they are polyphyletic in origin.
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Protists and fungi are a part of a unique kingdom of life. Protists are complex and diverse, while fungi are much simpler to characterize. Protists are unicellular organisms. The majority of fungi are multicellular organisms.