Resultado de búsqueda
Hace 1 día · Bacteria ( / bækˈtɪəriə / ⓘ; sg.: bacterium) are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria were among the first life forms to appear on Earth, and are present in most of its habitats.
Hace 6 días · 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 a sudden radiation of complex life occurred, and practically all major animal phyla started appearing in the fossil record.
Hace 5 días · 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.
Hace 1 día · Arthropods ( / ˈɑːrθrəpɒd / ARTH-rə-pod) [20] are invertebrates in the phylum Arthropoda. They possess an exoskeleton with a cuticle made of chitin, often mineralised with calcium carbonate, a body with differentiated ( metameric) segments, and paired jointed appendages.
Hace 4 días · Ctenophora ( / təˈnɒfərə / tə-NOF-ər-ə; sg.: ctenophore / ˈtɛnəfɔːr, ˈtiːnə -/ TEN-ə-for, TEE-nə-; from Ancient Greek κτείς (kteis) 'comb', and φέρω (pherō) 'to carry') [6] comprise a phylum of marine invertebrates, commonly known as comb jellies, that inhabit sea waters worldwide.
Hace 1 día · The history of life on Earth traces the processes by which living and fossil organisms evolved, from the earliest emergence of life to present day. Earth formed about 4.5 billion years ago (abbreviated as Ga, for gigaannum) and evidence suggests that life emerged prior to 3.7 Ga. [1] [2] [3] The similarities among all known present-day species ...
Hace 6 horas · Retrieved from "https://species.wikimedia.org/w/index.php?title=Amphiura_immira&oldid=9625474"
