Homeostasis of information in American embryology?
D000663:Amphibians; D000818:Animals; D004626:Embryology / Q000266:history*; D004790:Enzyme Induction; D049673:History, 20th Century; D008751:Methylene Blue; D009420:Nervous System / Q000196:embryology; D014481:United States
D008751:Methylene Blue