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  2. Protist - Wikipedia

    en.wikipedia.org/wiki/Protist

    Protists are abundant and diverse in nearly all habitats. They contribute 4 gigatons (Gt) to Earth's biomass—double that of animals (2 Gt), but less than 1% of the total. Combined, protists, animals, archaea (7 Gt), and fungi (12 Gt) make up less than 10% of global biomass, with plants (450 Gt) and bacteria (70 Gt) dominating. [166]

  3. Taxonomy of Protista - Wikipedia

    en.wikipedia.org/wiki/Taxonomy_of_Protista

    [1] [b] In the 21st century, the classification shifted toward a two-kingdom system of protists: Chromista (containing the chromalveolate, rhizarian and hacrobian groups) and Protozoa (containing excavates and all protists more closely related to animals and fungi). [2] The following groups contain protists.

  4. Protistology - Wikipedia

    en.wikipedia.org/wiki/Protistology

    All eukaryotes apart from animals, plants and fungi are considered protists. [1] Its field of study therefore overlaps with the more traditional disciplines of phycology , mycology , and protozoology , just as protists embrace mostly unicellular organisms described as algae , some organisms regarded previously as primitive fungi , and protozoa ...

  5. Marine protists - Wikipedia

    en.wikipedia.org/wiki/Marine_protists

    The term protist came into use historically as a term of convenience for eukaryotes that cannot be strictly classified as plants, animals or fungi. They are not a part of modern cladistics because they are paraphyletic (lacking a common ancestor for all descendants). Most protists are too small to be seen with the naked eye.

  6. Protozoa - Wikipedia

    en.wikipedia.org/wiki/Protozoa

    Protists are distributed across all major groups of eukaryotes, including those that contain multicellular algae, green plants, animals, and fungi. If photosynthetic and fungal protists are distinguished from protozoa, they appear as shown in the phylogenetic tree of eukaryotic groups.

  7. Eukaryote - Wikipedia

    en.wikipedia.org/wiki/Eukaryote

    Many eukaryotes are unicellular; the informal grouping called protists includes many of these, with some multicellular forms like the giant kelp up to 200 feet (61 m) long. [10] The multicellular eukaryotes include the animals, plants, and fungi, but again, these groups too contain many unicellular species. [11]

  8. Marine microorganisms - Wikipedia

    en.wikipedia.org/wiki/Marine_microorganisms

    Protists are eukaryotes that cannot be classified as plants, fungi or animals. They are usually single-celled and microscopic. Life originated as single-celled prokaryotes (bacteria and archaea) and later evolved into more complex eukaryotes. Eukaryotes are the more developed life forms known as plants, animals, fungi and protists.

  9. Heterotroph - Wikipedia

    en.wikipedia.org/wiki/Heterotroph

    [3] [4] Living organisms that are heterotrophic include all animals and fungi, some bacteria and protists, [5] and many parasitic plants. The term heterotroph arose in microbiology in 1946 as part of a classification of microorganisms based on their type of nutrition. [6] The term is now used in many fields, such as ecology, in describing the ...