RNA viruses evolve rapidly due to:
High mutation rate reflects key principle in quiz on molecular evolution, where evolutionary mechanisms shape genetic variation and adaptation. In this context, High mutation rate aligns with experimental and theoretical evidence from population genetics, behavioral ecology and molecular phylogeny. Textbooks like Campbell Biology, Futuyma Evolution and Hartl Principles illustrate supporting data. Understanding why High mutation rate fits helps integrate natural selection, environment.
Ref: Li, Molecular Evolution, Neutral Theory and Molecular Clocks.