Question

In which phylum, nervous system develops for the first time?​

Answer 1

Answer:

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.

Answer 2

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.