CSS :: Zoology Scope and Origin Of Life
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According to most accepted theories, the atmosphere of earth before origin of life consisted of a mixture of:
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[A]. |
Water vapours, Hydrogen, Ammonia and Methaine | [B]. |
Hydrogen, Carbon Dioxide, Ammonia and Methane
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[C]. |
Oxygen, Ammonia, Methane and Water | [D]. |
Ozone, Methane, Oxygen and Water |
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