Zoology - Evolution Question with Solution | TestHub

Theory of chemical evolution (by Oparin of Russia and Haldane of England):
- They proposed that chemical evolution (inorganic constituents$\to$Formation of diverse non-living organic molecules like RNA, protein, etc.) has resulted in the formation of first life forms.
- Conditions on earth at that time were:
a. High temperature.
b. Volcanic storms.
c. Reducing atmosphere containing${\mathrm{C}\mathrm{H}}_4,\mathrm{ }{\mathrm{N}\mathrm{H}}_3$, etc.

Experimental proof of the theory of chemical evolution [by S.L. Miller (American scientist) in 1953]:
- Similar atmospheric conditions were developed on a laboratory scale - Electric discharge in a closed flask containing${\mathrm{C}\mathrm{H}}_4,\mathrm{ }{\mathrm{H}}_2,\mathrm{ }{\mathrm{N}\mathrm{H}}_3$and water vapour at${800}^{\mathrm{o}}\mathrm{C}$.
- Result: Few Amino acids were obtained.