Kingdom is the highest category in the hierarchical classification of organisms created by Carolus Linnaeus around 1750. Linnaeus recognized two kingdoms, plants and animals, a scheme that worked reasonably well
Animals aremulticellularorganisms.The animal body is composed of several cells performing specific functions as opposed tobacteriaand most protists that are unicellular. The cells may then be organized into various animal tissues, such as epithelial tissues, connective tissues, muscle tissues, nervous ti...
any member of the animal kingdom: organisms that are multicellular and eukaryotic which possess non-photosynthetic, wall-less cells. In some classifications, certain unicellular organisms such as PROTOZOANS are also included. Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunder...
Protists are a diverse group of unicellular or multicellular organisms. Protists have membrane-bound organelles and are placed in the Eukarya domain because they are eukaryotes, which means they have a nucleus. Protists are polyphyletic, meaning they are derived from more than one common evolutionar...
Animal, any of a group of multicellular eukaryotic organisms thought to have evolved independently from the unicellular eukaryotes. Animals differ from other multicellular eukaryotes, the plants and the fungi, in morphology and physiology in that animals
The results of this analysis highlighted four main themes regarding the evolution, retention and duplication of SPIRE in eukaryotes (Fig.1, Supplementary Fig.1). First, SPIRE homologues exist in the majority of Holozoa, including multicellular animals and their closest unicellular relatives, but not...
Which classification level is broader than the kingdom level? What is the largest phylum of animals? What kingdom are members of the phylum Mollusca a part of? What are animal-like protists called? Which kingdom includes autotrophic and heterotrophic, unicellular and multicellular organisms? What...
A curious form of scanning phototaxis is present in the multicellular slug stage of the slime mouldDictyostelium discoideum.Dictyosteliumbegins life as a spore, germinating into many independent unicellular amoebae. These cells gather and join together to form a multicellular slug, a slime-covered bag...
Protists are living organisms that belong to their own kingdom based on their unique characteristics. They are eukaryotic, meaning they are made of cells that are complex and full of organelles. Many are unicellular and they are either plant-like, animal-like, both plant and animal-like, or...
The Protista, or Protoctista, are a kingdom of simple eukaryotic organisms, usually composed of a single cell or a colony of similar cells. Protists live in water, in moist terrestrial habitats, and as parasites and other symbionts in the bodies of multicellular eukaroytes. ...