title: The developmental localization of macromolecular groups in selected stages of Hydractinia echinata.
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D003063:Cnidaria / Q000196:embryology*; D066298:In Vitro Techniques; D046911:Macromolecular Substances / Q000096:biosynthesis*; D009024:Morphogenesis
chemical_list: D046911:Macromolecular Substances