In which phylum, nervous system develops for the first time?
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Simple nerve nets seen in animals like Cnidaria (jellyfish) evolved first, consisted of polymodal neurons which serve a dual purpose in motor and sensory functions. Cnidarians can be compared to Ctenophores (comb jellyfish), which although are both jellyfish, have very different nervous systems.
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Simple nerve nets seen in animals like Cnidaria (jellyfish) evolved first, consisted of polymodal neurons which serve a dual purpose in motor and sensory functions. Cnidarians can be compared to Ctenophores (comb jellyfish), which although are both jellyfish, have very different nervous systems.
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