title: Extrachromosomal elements as possible agents of adaptation and development.
mesh_terms: D000222:Adaptation, Physiological; D001419:Bacteria / Q000254:growth & development*; D001435:Bacteriophages; D005075:Biological Evolution; D004352:Drug Resistance, Microbial; D004926:Escherichia coli / Q000187:drug effects; D005111:Extrachromosomal Inheritance; D005796:Genes; D008242:Lysogeny; D009154:Mutation; D009858:Oncogenic Viruses; D010957:Plasmids; D011815:R Factors; D012328:RNA Viruses; D013307:Streptomycin / Q000494:pharmacology; D014170:Transformation, Genetic
chemical_list: D013307:Streptomycin