Respuesta :

  • Sea cucumbers are echinoderms, a phylum that includes sea urchins and starfish.
  • Echinoderms have a five-way radial symmetry, a pattern most familiar in the shape of the starfish.
  • In sea cucumbers this character is shown in the five strips of muscle inside the body wall, running from the front to the back.
  • The organism was motile and bilateral in symmetry.
  • Bilateral symmetry means the organism can be cut right down the middle and be split into two equal halves.
  • The echinoderm ancestry later developed radial symmetry as it was thought to be more advantageous to the species

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