title: The development of the tectum in Xenopus laevis: an autoradiographic study.
mesh_terms: D000818:Animals; D001345:Autoradiography; D004247:DNA / Q000096:biosynthesis; D007814:Larva / Q000254:growth & development; D008675:Metamorphosis, Biological; D009024:Morphogenesis; D009434:Neural Pathways; D009899:Optic Lobe, Nonmammalian / Q000196:embryology* / Q000378:metabolism; D012160:Retina / Q000254:growth & development; D013936:Thymidine / Q000378:metabolism; D013997:Time Factors; D014316:Tritium; D014981:Xenopus / Q000196:embryology*
chemical_list: D014316:Tritium; D004247:DNA; D013936:Thymidine