Explain the Oparin-Haldane theory regarding the origin of life.

(N/A) The Oparin-Haldane theory suggests that life originated from pre-existing non-living organic molecules (e.g.,$RNA$,proteins,etc.).
Life formed after chemical evolution,meaning that organic compounds were synthesized from the aggregation of inorganic molecules.
At that time,the conditions on Earth were characterized by very high temperatures,volcanic storms,and a reducing atmosphere containing gases like methane $(CH_4)$,ammonia $(NH_3)$,and water vapor $(H_2O)$.