title: The association of primary embryonic organizer activity with the future dorsal side of amphibian eggs and early embryos.
mesh_terms: D000557:Ambystoma; D000818:Animals; D001001:Anura; D001755:Blastocyst / Q000502:physiology; D002454:Cell Differentiation; D004625:Embryo, Nonmammalian / Q000166:cytology / Q000502:physiology* / Q000637:transplantation; D004627:Embryonic Induction; D005260:Female; D009024:Morphogenesis; D011898:Ranidae; D014184:Transplantation, Homologous; D014981:Xenopus; D015053:Zygote / Q000166:cytology / Q000502:physiology* / Q000637:transplantation