Risultati di ricerca
2 giorni fa · It is now generally thought that the Calcarea (sponges with calcium carbonate spicules) are more closely related to Cnidaria, Ctenophora (comb jellies) and Bilateria (all the more complex animals) than they are to the other groups of sponges.
22 mag 2024 · The Cambrian explosion (also known as Cambrian radiation [1] or Cambrian diversification) is an interval of time approximately 538.8 million years ago in the Cambrian period of the early Paleozoic when there was a sudden radiation of complex life, and practically all major animal phyla started appearing in the fossil record.
6 giorni fa · If it is indeed ctenophore, it places the group close to the origin of the Bilateria. The early Cambrian sessile frond -like fossil Stromatoveris , from China's Chengjiang lagerstätte and dated to about 515 million years ago , is very similar to Vendobionta of the preceding Ediacaran period.
6 giorni fa · List of Ediacaran genera. This is a list of all described Ediacaran genera, including the Ediacaran biota. It contains 227 genera. Valid genus. Junior synonym. Vague status. Rejected as valid taxon. Name.
2 giorni fa · Kingdom (biology) The hierarchy of biological classification 's eight major taxonomic ranks. A domain contains one or more kingdoms. Intermediate minor rankings are not shown. In biology, a kingdom is the second highest taxonomic rank, just below domain. Kingdoms are divided into smaller groups called Phylum.
4 giorni fa · Bibliography. External links. Bacteria ( / bækˈtɪəriə / ⓘ; sg.: bacterium) are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms.
22 mag 2024 · Bilateria. O clado Bilateria inclui todos os metazoários que apresentam corpos organizados em um eixo antero-posterior (ou sagital) fazendo com que possam, em sua grande maioria, serem divididos em duas metades simétricas.
