title: Viruses, protoviruses, development, and evolution.
mesh_terms: D001483:Base Sequence; D005075:Biological Evolution; D002454:Cell Differentiation; D004247:DNA / Q000235:genetics; D004251:DNA Transposable Elements; D005914:Globins / Q000235:genetics; D012194:RNA-Directed DNA Polymerase / Q000502:physiology; D012091:Repetitive Sequences, Nucleic Acid; D012190:Retroviridae / Q000235:genetics*
chemical_list: D004251:DNA Transposable Elements; D005914:Globins; D004247:DNA; D012194:RNA-Directed DNA Polymerase