Science, Том 317,Выпуски 5834-5840John Michels (Journalist) American Association for the Advancement of Science, 2007 |
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Стр. 86
... cnidarians ( anem- ones , jellyfish , and hydra ) , and ctenophores ( comb jellies ) ( 1 , 2 ) . This eumetazoan ancestor lived perhaps 700 million years ago . Although it is not preserved in the fossil record ( 3 ) , we can infer many ...
... cnidarians ( anem- ones , jellyfish , and hydra ) , and ctenophores ( comb jellies ) ( 1 , 2 ) . This eumetazoan ancestor lived perhaps 700 million years ago . Although it is not preserved in the fossil record ( 3 ) , we can infer many ...
Стр. 116
... cnidarians , and the bilaterally symmetric animals , which includes all worm phyla . Buddenbrockia plumatellae is an active , muscular , parasitic worm that belongs to the phylum Myxozoa , a group of morphologically simplified ...
... cnidarians , and the bilaterally symmetric animals , which includes all worm phyla . Buddenbrockia plumatellae is an active , muscular , parasitic worm that belongs to the phylum Myxozoa , a group of morphologically simplified ...
Стр. 118
... cnidarians . One interpretation is that the common ancestor of cnidarians and bilaterians had a muscular worm- shaped body plan . However , this does not seem compatible with the ultrastructure of Budden- brockia or the phylogenetic ...
... cnidarians . One interpretation is that the common ancestor of cnidarians and bilaterians had a muscular worm- shaped body plan . However , this does not seem compatible with the ultrastructure of Budden- brockia or the phylogenetic ...
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