Anatomy Development period- week 1,2,3,4 1a5fe7bb The epiblast is capable of forming which of the following germ layers? A Ectoderm only B Ectoderm and mesoderm only C Ectoderm and endoderm only D Ectoderm, mesoderm, endoderm High-Yield Explanation The epiblast is capable of forming all three germ layers (ectoderm, mesoderm, and endoderm) during gastrulation week 3 of development .