进取心
发表于 2025-3-25 06:28:50
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RAFF
发表于 2025-3-25 11:08:57
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orient
发表于 2025-3-25 13:49:26
Summary and Beyond,s, and however strongly it may be wished, convergence and analogy in organisms of unknown relationships cannot be differentiated from homology and phylogeny. While many receptaculitid characters may appear to be homologous with structures in sponges or dasyclads, they may be structurally convergent.
死猫他烧焦
发表于 2025-3-25 17:15:39
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keloid
发表于 2025-3-25 22:05:07
f phosphatized receptaculitids on the Baltic Sea island ofÖland, the authors conclude that receptaculitids possess anattribute not found in any other group of organisms, living or fossil.978-1-4613-7124-3978-1-4615-4691-7
缝纫
发表于 2025-3-26 02:00:26
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流动才波动
发表于 2025-3-26 04:44:30
Geology,t receptaculitids may have been related to the Cambrian radiocyathids, however, Andrey Yu. Zhuravlev (1989) opposed this. Unless these relationships will be adequately proven, receptaculitids appear to have originated abruptly in the Early Ordovician, and their ancestry remains unknown.
继承人
发表于 2025-3-26 11:21:56
Morphology of a Merom,). Feet, when present, are parallel to the plates, and often reflect the rhombic shapes of the plates (fig. 5.2) or are triangular (fig. 5.3). Heads form the ectorhin, and feet the endorhin (Billings 1865a), but a two-walled structure forms only when feet are present. In . the shafts are thick and the heads and feet are massive (fig. 5.1)
丛林
发表于 2025-3-26 16:04:07
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Toxoid-Vaccines
发表于 2025-3-26 19:24:41
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