The conditions of the earth atmosphere conducive for the origin of life were:
(a) Presence of high temperature, CH4, NH3, and O3
(b) High temperature, CH4, NH3, volcanic eruption
(c) High temperature, volcanic eruption, O2, NH3
(d) Volcanic eruption, CH3, NH3 and O2
Correct option is (b)
Life originated from inanimate matter- This was first proposed by Alexander Oparin & J.B.S Haldane. According to Oparin & Haldane postulates- Some volcanic eruptions took place on primitive earth resulting in formation of water bodies with some reducing substances like hydrogen, ammonia, methane, water vapour etc at their bottom surface. These reducing substances favored the formation of some organic compounds which became the possible precursors of cells.
This Oparin -Haldane hypothesis was proved by Urey- Miller in 1953. They conducted an experiment in which they created an atmosphere containing CH4 , H2, H2O, and NH3 in a reaction vessel. Next, they ran a continuous electric current through the system, to simulate lightning, resulting in the production of several small organic molecules including urea, hydrogen cyanide, acetic acid and amino acids. These amino acids are the building blocks of proteins in living cells.
Hence this shows that life originated from inanimate matter.
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