Origin of life on Earth is estimated to be around
3.5 billion years ago reflects key principle in quiz on origin of life, where evolutionary mechanisms shape genetic variation and adaptation. In this context, 3.5 billion years ago 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 3.5 billion years ago fits helps integrate natural selection, drift and species concepts essential for NEET, CSIR-NET and GATE examinations. This concept integrates genetics, ecology and molecular evidence, frequently tested in NEET, GATE and CSIR-NET, highlighting links between genotype,
Ref: NCBI Bookshelf, Molecular Cell Biology, Origin of Life Theories.