A gas absent during the pre-biotic environment was:
Correct answer: D. H2
- A. SO2
- B. CO2
- C. NH3
- D. H2
Explanation
The Earth's atmosphere is unable to support the light gaseous molecules of hydrogen and hence they are only present in combined form not the gaseous form.
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About Evolution
Evolution describes heritable change in populations over generations through variation, natural selection and adaptation. Lamarckism explains inheritance of acquired characteristics, while Darwinism explains selection of favourable inherited variations; these historical explanations must not be confused with the modern genetic account of evolutionary change.
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