If you go back in the history approx. 4500 million years back when atm – McqOptions

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1.	If you go back in the history approx. 4500 million years back when atmosphere was reducing the organism were [CPMT 2001; MP PMT 2001; BVP 2003; BHU 2003]
A.	Autotroph, aerobic
B.	Chemo-autotroph, anaerobic
C.	Chemo-heterotroph, anaerobic
D.	Heterotroph, anaerobic
Answer» D. Heterotroph, anaerobic

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