urmetazoan wikipedia - EAS
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The Urmetazoan is the hypothetical last common ancestor of all animals or metazoans. It is universally accepted to be a multicellular heterotroph — with the novelties of a germline and oogamy, an extracellular matrix (ECM) and basement membrane, cell-cell and cell-ECM adhesions and signaling … See more
All animals are posited to have evolved from a flagellated eukaryote. Their closest known living relatives are the choanoflagellates, collared flagellates whose cell morphology is similar to the choanocyte cells of … See more
• Evolution of nervous systems – Origin and subsequent variation and development of neurons and neural tissues and organs
• Ikaria wariootia – Early bilaterian organism fossil species See moreFive different hypotheses for the animals' last common ancestor have been put forward. The relationships between the different animal phyla themselves are not well-resolved, so discriminating between the hypotheses is difficult.
Placula hypothesis See more• Biota (Taxonomicon)
• Life (Systema Naturae 2000)
• Vitae (BioLib)
• Wikispecies – a free directory of life See moreWikipedia text under CC-BY-SA license Biology:Urmetazoan - HandWiki
Urmetazoan - Unionpedia, the concept map