A) Photoautotrophs
B) Chemoautotrophs
C) Chemoheterotrophs
D) Coacervaters
Correct Answer: C
Solution :
The first organism originated on the earth were chemo-heterotrophs. They obtained the energy by the fermentation of complex organic substances as they live in the sea bottom where sunlight (i.e., source of energy for most terresterial organism) was not reached.
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