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Showing 1 to 3 of 3 for “"Phylum Porifera"”.
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Molecular Evolution in non-bilaterian Metazoa with Emphasis on Phylum Porifera
… der basalen Stämme innerhalb der Metazoa (Porifera, Placozoa, Cnidaria and Ctenophora) sind noch immer nicht abschliessend geklärt und Gegenstand wissenschaftlicher Diskussionen. Ein Grund für unser fehlendes Verständnis ist die einfache Organisation dieser Tiere, die nur wenige informative …
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Gene Expression in the Choanoderm
<p>The body plan of sponges (phylum Porifera) is an outlier among modern animals and is thought to have special evolutionary significance. Sponges lack muscles, nerves and a gut. Instead, they are composed of few cell types and simple tissues that function to pump water through an internal canal …
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COORDINATED PHENOMENA IN THE MARINE DEMOSPONGE CHONDROSIA RENIFORMIS: PHYSIOLOGICAL, MORPHOLOGICAL, BIOMECHANICAL AND BIOCHEMICAL ASPECTS.
Although sponges (phylum Porifera) are still often considered to be simple, inactive animals, both larvae and adults of different species show clear coordination phenomena triggered by both extrinsic and intrinsic stimuli. Moreover although sponges lack a nervous system, they show a range of …