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- Cambrian_explosion abstract "The Cambrian explosion, or Cambrian radiation, was the relatively rapid appearance, around 542 million years ago, of most major animal phyla, as demonstrated in the fossil record. This was accompanied by major diversification of other organisms. Before about 580 million years ago, most organisms were simple, composed of individual cells occasionally organized into colonies. Over the following 70 or 80 million years, the rate of evolution accelerated by an order of magnitude and the diversity of life began to resemble that of today. Ancestors of many of the present phyla appeared during this period, with the exception of Bryozoa, which made its earliest known appearance in the Lower Ordovician.The Cambrian explosion has generated extensive scientific debate. The seemingly rapid appearance of fossils in the “Primordial Strata” was noted as early as the 1840s, and in 1859 Charles Darwin discussed it as one of the main objections that could be made against the theory of evolution by natural selection. The long-running puzzlement about the appearance of the Cambrian fauna, seemingly abruptly and from nowhere, centers on three key points: whether there really was a mass diversification of complex organisms over a relatively short period of time during the early Cambrian; what might have caused such rapid change; and what it would imply about the origin and evolution of animals. Interpretation is difficult due to a limited supply of evidence, based mainly on an incomplete fossil record and chemical signatures remaining in Cambrian rocks.Phylogenetic analysis has supported the view that during the Cambrian radiation metazoa evolved monophyletically from a single common ancestor: flagellated colonial protists similar to modern choanoflagellates.".
- Cambrian_explosion thumbnail Opabinia_BW2.jpg?width=300.
- Cambrian_explosion wikiPageExternalLink en.
- Cambrian_explosion wikiPageExternalLink scholar?hl=en&lr=&q=intitle%3AThe+Cambrian+%E2%80%9Cexplosion%E2%80%9D%3A+Slow-fuse+or+megatonnage%3F&as_publication=&as_ylo=&as_yhi=&btnG=Search.
- Cambrian_explosion wikiPageExternalLink GouldComment.pdf.
- Cambrian_explosion wikiPageExternalLink all.
- Cambrian_explosion wikiPageExternalLink inourtime_20050217.ram.
- Cambrian_explosion wikiPageExternalLink contents.php?vol=47&issue=7–8&doi=14756326.
- Cambrian_explosion wikiPageExternalLink cambrianlife.
- Cambrian_explosion wikiPageExternalLink 4426.full.
- Cambrian_explosion wikiPageExternalLink science?_ob=ArticleURL&_udi=B83WC-4N0HJMK-2&_user=1300184&_coverDate=12%2F31%2F2007&_rdoc=6&_fmt=summary&_orig=browse&_srch=doc-info(%23toc%2333783%232007%23999839995%23671853%23FLA%23display%23Volume)&_cdi=33783&_sort=d&_docanchor=&_ct=9&_acct=C000052237&_version=1&_urlVersion=0&_userid=1300184&md5=d9c2663e7fbd6a77385d61334953d75d.
- Cambrian_explosion wikiPageExternalLink metazoafr.html.
- Cambrian_explosion wikiPageID "19349161".
- Cambrian_explosion wikiPageRevisionID "606484552".
- Cambrian_explosion caption "Stem groups.".
- Cambrian_explosion hasPhotoCollection Cambrian_explosion.
- Cambrian_explosion height "180".
- Cambrian_explosion imageLeft "0".
- Cambrian_explosion imageTop "0".
- Cambrian_explosion imageWidth "200".
- Cambrian_explosion width "200".
- Cambrian_explosion subject Category:Cambrian.
- Cambrian_explosion subject Category:Fossils.
- Cambrian_explosion subject Category:Paleontology.
- Cambrian_explosion subject Category:Unsolved_problems_in_biology.
- Cambrian_explosion type Adult109605289.
- Cambrian_explosion type CausalAgent100007347.
- Cambrian_explosion type Dodo110022908.
- Cambrian_explosion type Fossils.
- Cambrian_explosion type LivingThing100004258.
- Cambrian_explosion type Object100002684.
- Cambrian_explosion type Oldster110376523.
- Cambrian_explosion type Organism100004475.
- Cambrian_explosion type Person100007846.
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- Cambrian_explosion type YagoLegalActor.
- Cambrian_explosion type YagoLegalActorGeo.
- Cambrian_explosion comment "The Cambrian explosion, or Cambrian radiation, was the relatively rapid appearance, around 542 million years ago, of most major animal phyla, as demonstrated in the fossil record. This was accompanied by major diversification of other organisms. Before about 580 million years ago, most organisms were simple, composed of individual cells occasionally organized into colonies.".
- Cambrian_explosion label "Cambrian explosion".
- Cambrian_explosion label "Cambrische explosie".
- Cambrian_explosion label "Eksplozja kambryjska".
- Cambrian_explosion label "Esplosione cambriana".
- Cambrian_explosion label "Explosion cambrienne".
- Cambrian_explosion label "Explosión cámbrica".
- Cambrian_explosion label "Explosão Cambriana".
- Cambrian_explosion label "Kambrische Explosion".
- Cambrian_explosion label "Кембрийский взрыв".
- Cambrian_explosion label "انفجار كامبري".
- Cambrian_explosion label "カンブリア爆発".
- Cambrian_explosion label "寒武纪大爆发".
- Cambrian_explosion sameAs Kambrická_exploze.
- Cambrian_explosion sameAs Kambrische_Explosion.
- Cambrian_explosion sameAs Explosión_cámbrica.
- Cambrian_explosion sameAs Explosion_cambrienne.
- Cambrian_explosion sameAs Letusan_Kambrium.
- Cambrian_explosion sameAs Esplosione_cambriana.
- Cambrian_explosion sameAs カンブリア爆発.
- Cambrian_explosion sameAs 캄브리아기의_대폭발.
- Cambrian_explosion sameAs Cambrische_explosie.
- Cambrian_explosion sameAs Eksplozja_kambryjska.
- Cambrian_explosion sameAs Explosão_Cambriana.
- Cambrian_explosion sameAs m.0c1ck.
- Cambrian_explosion sameAs Q32919.
- Cambrian_explosion sameAs Q32919.
- Cambrian_explosion sameAs Cambrian_explosion.
- Cambrian_explosion wasDerivedFrom Cambrian_explosion?oldid=606484552.
- Cambrian_explosion depiction Opabinia_BW2.jpg.
- Cambrian_explosion isPrimaryTopicOf Cambrian_explosion.
