What was the source of hydrgen for first photosynthetic organisms?
Correct answer: D. Hydrogen Sulphide
- A. Water
- B. Hydrogen present in soil
- C. Hydrogen sulphate
- D. Hydrogen Sulphide
Explanation
In the dwindling supply of nutrients, the first photosynthetic organism probably used hydrogen sulfide as hydrogen source to reduce carbon dioxide. Later on, water served this purpose.
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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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