The inorganic air molecules converted into organic molecules in the per atmosphere cause of electric discharges and solar radiation. These substances dissolved in water and the first living forms originated. Alexander Opharin and J.B.S.Haldean -|1923|are the scientists who exposed this opinion for the first time and later Stanly Miller |1955|confirmed their opinion by a probative research. He imitated the condition of the pre earth inside flasks in a laboratory, they say that Amino acids Hydrocarbons and many other organic molecules in the atmosphere.
The energy which required for this process was gained by Soler radiation thunderbolts which caused. Bo powerful electric discharges volcanism and the heat which caused by radioactive corrosions.
Scientists believe that the pre ocean was a Primordial Soup and it originated by organic molecules.
This Primordial Soup contained Amino acids, nitrogenous bases, simple sugar and nucleic acids. These molecules were unitedly cover by a layer of lipids. These structures evaluated in to pre cells. These cells contained the characteristics of living organisms such as growth self replication, This can be known as the origin of life. The organisms who formed for the first time on the earth are called as anaerobic heterotrophic prokaryotic.
According to this bio chemical evolution of the bio diversity, life originated before about 3.5 billions of years ago, on earth. In another hand who can discard the hypothesis that the life in our earth is just another laboratory for some group of well developed creatures out side of our Milky way.