Further morphological and biochemical studies on normal and hybrid embryos of sea urchins.
D000225:Adenine / Q000378:metabolism; D002247:Carbon Isotopes; D002467:Cell Nucleus; D004247:DNA / Q000096:biosynthesis; D004447:Echinodermata; D004625:Embryo, Nonmammalian; D006824:Hybridization, Genetic; D066298:In Vitro Techniques; D012313:RNA / Q000096:biosynthesis*; D011874:Radiometry
D002247:Carbon Isotopes; D012313:RNA; D004247:DNA; D000225:Adenine