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  • UP CPMT 2006 Biology
  • Which of the following was absent in primitive environmen...
Multiple choice

Which of the following was absent in primitive environment during origin of life?

  1. O2

  2. CH4

  3. H2O

  4. H2

  5. -

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Initially, oxygen was absent as there was no photosynthesis.

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