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List of top Biology Questions on Origin Of Life

In the Miller-Urey experiment, what was the ratio of gases used to simulate primitive Earth's atmosphere?

Match List I with List II:

List I		List II
A	Mesozoic Era	I	Lower invertebrates
B	Proterozoic Era	II	Fish & Amphibia
C	Cenozoic Era	III	Birds & Reptiles
D	Paleozoic Era	IV	Mammals

Choose the correct answer from the options given below:

Which component was not found in the early Earth's atmosphere?