Weba) ancestral sponges exhibited morphologic complexity seen in other Eumetazoans. b) the anatomical complexity of ctenophores arose independently of what is found in other … WebThe nervous system was gained only once and never lost. Early animal possessed true tissues. Multicellularity evolved twice within animals. Choanocytes and choanoflagellates are homologous cell types. Question: Which is most likely true if we accept the ctenophores as the animal outgroup? The nervous system was gained only once and never lost.

Convergent evolution of neural systems in ctenophores - PMC

Webnervous systems of ctenophores as compared to cnidarians and bilaterians. However, this proposition would need to be proven with B.J., extensive functional assays. One thing is … WebLarge concentrations of nerve cells--as in the brain--are not found in these systems, though there may be ganglia, or small local concentrations of neurons. Diffuse systems are found in cnidarians (hydroids, jellyfish, sea anemones, corals) and in ctenophores, or comb jellies. However, the primitive nervous systems of these animals do not ... demon slayer animation software

The phylogenetic position of ctenophores and the origin (s) of …

WebJan 13, 2015 · Ctenophores have traditionally been treated as eumetazoans, but some recent whole genome studies have revived the idea that they are, rather, the sister group … WebThe nervous systems of the radially symmetric organisms ctenophores (comb jellies) and cnidarians (which include anemones, hydras, corals and jellyfish) consist of a diffuse … WebCtenophora means “comb-bearing”. They are commonly known as comb jellies or sea walnuts. The distinguishing feature of the phylum is the presence of comb plates with … demon slayer animations minecraft mod