两侧对称动物(Bilateria)与辐射对称动物(Radiata)共同组成真后生动物(Eumetazoa)
... 两侧对称花:zygomorphic flower 两侧对称动物:bilateral animal 两侧对称的:bilaterally symmetrical ...
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32三胚层、两侧对称动物(Three germ layers&Bilateria) 41无体腔动物(Acoelomata)
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三胚层、两侧对称动物 Three germ layers&Bilateria
两侧对称动物在寒武纪繁衍旺盛,因此追踪它们的起源对了解动物是如何进化而来的十分重要。
Bilateral animals flourished in the Cambrian so tracing their origins is crucial to understanding the pace of animal evolution.
状况变得很清楚:只有真实的化石,才能为两侧对称动物出现的时间提供确凿的证据。
It had become clear that only actual fossils would furnish incontrovertible evidence for the time at which bilaterians had emerged.
在前一种中,左右型对称骨片的存在证实该动物两侧对称。
Left right sclerite pairs are found which proves a bilaterally symmetrical body of the animal.
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