title: Does a "500 million-year-old hormone" disprove Darwin?
authors.forename: Martin
authors.initials: M
authors.lastname: Hafner
authors.forename: Gert
authors.initials: G
authors.lastname: Korthof
mesh_terms: D000818:Animals; D002938:Ciona intestinalis / Q000235:genetics* / Q000502:physiology*; D004171:Diploidy; D019143:Evolution, Molecular; D016678:Genome; D006238:Haploidy; D007447:Invertebrate Hormones / Q000235:genetics*; D016133:Polymerase Chain Reaction / Q000379:methods
chemical_list: D007447:Invertebrate Hormones