In which phylum, mouth develops after Anus?
Annelids
Arthopods
Echinodermata
Mollusca
Echinoderma and chordates are regared as Deuterostomes. [Deutero - last, Stoms - mouth]
Annelids, Arthropods, Molluscs are
Protostomes [ Prosto - first, Stoma - mouth]