option D is wrong which one is right Why are nematodes in a different clade than annelids and playthelminthes? (Ecydsozoa vs. Lophotrochozoa)? Nematodes are more abundant than platyhelminthes & annelids Nematodes have more advanced body systems than annelids or playthelminthes Nematodes molt their cuticle several times during development All parasitic organisms are placed in Clade Ecdysozoa.