Radiometric dating using carbon-14 is useful up to
50,000 years reflects key principle in quiz on geological time scale+pyqs, where evolutionary mechanisms shape genetic variation and adaptation. In this context, 50,000 years 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 50,000 years fits helps integrate natural selection, environment.
Ref: USGS, Geological Time Scale, Eons and Eras.