Houjun Liu


Something is considered “Living” when they exhibit two main biological functions

Two Main Functions of Life

theories of origin of life

  • Manfred Eigen ("RNA-World" theory): genes form, constructing enzymes, forming cells
  • Alexander Oparin: cells form, creating enzymes as needed, forming the genes to encode them
  • Freeman Dyson: Dyson’s Model of Life—basically the Oparin model, but with more specifics about how genes evolve