Question

cephalization first occurs in which phylum??

Answer 1

Even hydras, which are primitive, radially symmetrical cnidarians , show some degree of cephalization. They have a "head" where their mouth, photoreceptive cells, and a concentration of neural cells are located. Flatworms (phylum Platyhelminthes) are the most primitive animals with bilateral symmetry.

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Answer 2

here is your answer

cephalization occur in flatworms ( phylum platyhelminthus ).

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