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Examples of basic protist forms that do not represent evolutionary cohesive lineages include: [7] Algae , which are photosynthetic protists. Traditionally called "protophyta", they are found within most of the big evolutionary lineages or supergroups , intermingled with heterotrophic protists which are traditionally called " protozoa ". [ 8 ]
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. [ 1][ 2] Historically, protozoans were regarded as "one-celled animals".
Marine protists are defined by their habitat as protists that live in marine environments, that is, in the saltwater of seas or oceans or the brackish water of coastal estuaries. Life originated as marine single-celled prokaryotes (bacteria and archaea) and later evolved into more complex eukaryotes. Eukaryotes are the more developed life forms ...
A protist (/ ˈ p r oʊ t ɪ s t /) is any eukaryotic organism (one with cells containing a nucleus) that is not an animal, plant, or fungus.The protists do not form a natural group, or clade, since they exclude certain eukaryotes with whom they share a common ancestor; [a] but, like algae or invertebrates, the grouping is used for convenience.
Alveolate. The alveolates (meaning "pitted like a honeycomb") [ 2] are a group of protists, considered a major clade [ 3] and superphylum [ 4] within Eukarya. They are currently grouped with the stramenopiles and Rhizaria among the protists with tubulocristate mitochondria into the SAR supergroup .
Protistology is a scientific discipline devoted to the study of protists, a highly diverse group of eukaryotic organisms. 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 ...
Phytoplankton are photosynthesizing microscopic protists and bacteria that inhabit the upper sunlit layer of marine and fresh water bodies of water on Earth. Paralleling plants on land, phytoplankton undertake primary production in water, [2] creating organic compounds from carbon dioxide dissolved in the water.
Kinetoplastida (or Kinetoplastea, as a class) is a group of flagellated protists belonging to the phylum Euglenozoa, [ 3][ 4] and characterised by the presence of a distinctive organelle called the kinetoplast (hence the name), a granule containing a large mass of DNA. The group includes a number of parasites responsible for serious diseases in ...