title: Biology's variable logic.
authors.forename: J R
authors.initials: JR
authors.lastname: Parks
mesh_terms: D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D002645:Chickens / Q000254:growth & development*; D008715:Methionine / Q000008:administration & dosage; D012107:Research Design / Q000592:standards*
chemical_list: D008715:Methionine