Discussion
Chemoautotrophs can survive on ______alone.
Answer: C
Correct answer: minerals and CO2
A chemoautotroph takes its energy from oxidising an inorganic compound such as ammonia, nitrite, sulfide or ferrous iron, and its carbon from CO2. So it needs minerals and CO2 and nothing organic at all - which is what lets such organisms colonise bare rock and deep-sea vents.
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