ORIGIN OF LIFE ON EARTH
Origin of life on Earth There are some hipotheses about the origin of life in our planet: -1920: The Oparin-Handale hypothesis´s steps are: 1) The formation of organic molecules from inorganic compounds. 2) The formation of polymers of organic molecules 3) The formation of protocells with a semi-permeable membrane since organic molecules and polymers. -1950: Miller-Urey experiment: They tested and confirmed the first step of Oparin-Handale hypothesis. -2006: Organic molecules from meteors: Many scientists think that extra-terrestrial organic matter contributed with the formation of organic molecules on earth began. Bernstein propouse the 3 major sources of pre-life Earth´s organic molecules. A- Atm...
