title: The viroid: biological oddity or evolutionary fossil?
authors.affiliation: Center for Agricultural Biotechnology, University of Maryland Biotechnology Institute, University of Maryland, College Park, Maryland 20742, USA.
authors.forename: T O
authors.initials: TO
authors.lastname: Diener
mesh_terms: D019143:Evolution, Molecular; D005580:Fossils; D014772:Viroids / Q000145:classification / Q000235:genetics* / Q000502:physiology