동아사이언스

머리좋은 생물들

과학동아 1992년 07호

retrogressive evolution" of the phylum, because they don't have obvious feet or heads and aren't brainy at all. Johnny Hart's wonderful talking clams have legs and feet, but real ones don't talk or walk.Phylum Mollusca contains a remarkable class called Cephalopoda, meaning head plus foot-because the tentacles emerge from the head. Of the 10,000 species of Cephalopoda that once roamed ...