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Biology, 19.10.2019 01:30 gladyscasper44

Annelids, like the earthworm, and arthropods, like insects or spiders, have three main structures in their nervous systems:
a brain, a dorsal nerve cord, and a ventral nerve cord
a brain, segmented ganglia, and a ventral nerve cord
segmented ganglia, a dorsal nerve cord, and a ventral nerve cord

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Annelids, like the earthworm, and arthropods, like insects or spiders, have three main structures in...
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