<prompt> Hypoblast forms:NotochordApical ligament of atlasEndodermProchordal plate  <response>: Ans. D Prochordal plateRef: Netters Clinical Anatomy, 3rd ed. pg. 39 Hypoblast and epiblast are 2 germ layers in the second week of embryonic development. The hypoblast gives rise to prochordal plate which is the future site of mouth and forms the cranio-caudal axis. Notochord is formed by epiblast cells. Epiblast is also the source of all three germ layers. First germ layer to be formed is the endoderm. Q Remnants of notochord are nucleus pulposus and apical ligament of atlas. 