Which of the following is likely to have been absent in free form at the time of origin of life? A. Oxygen B. Methane C. Nitrogen D. Ammonia Right Answer: D. Ammonia Share : January 3, 2018 Hassan Ali Zoology Total 0 Votes: 0 0 Tell us how can we improve this Mcqs? Captcha: + = Verify Human or Spambot ? Related Mcqs Check Below -Which of the following chromatophores in frog have guanin in them?A renal portal system is found in?In which of the following animals eggs develop inside cocoons?