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Class 12BiologyEvolutionOrigin of Life
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If you go back in history approximately $4500$ million years,when the atmosphere was reducing,the organisms were:

  • A
    Autotroph,aerobic
  • B
    Chemo-autotroph,anaerobic
  • C
    Chemo-heterotroph,anaerobic
  • D
    Heterotroph,anaerobic
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Class 12 Questions

Class 12

Biology Questions

Chapter

Evolution

Subtopic

Origin of Life

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