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Which phyla have well developed nervous system

User Hardik Chugh
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2 Answers

18 votes
18 votes
Nematodes

Nematodes (phylum Aschelminthes) have a high degree of centralization, with three-quarters of all nerve cells concentrated in a group of anteriorly placed ganglia and no peripheral plexuses or nets.
User Donnyton
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13 votes

Answer:

Cnidarians.......hope it helps

User Rafael Oltra
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