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Evolution of life forms from non-living organic molecules cannot occur now because of the
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a
increasing global warming at present
b
presence of oxygen in the atmosphere
c
thinning of the ozone layer and exposure to UV
d
absence of substrates available in the primitive earth
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Correct option is B
The oxidizing atmosphere of today is not conducive to the spontaneous synthesis of complex molecules because the oxygen attacks chemical bonds, extracting electrons.The primitive earth had a reducing atmosphere.Talk to our academic expert!
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