It is not so difficult to imagine what it means to feed on the organic molecules that
Chapter 0, Problem 1-6(choose chapter or problem)
It is not so difficult to imagine what it means to feed on the organic molecules that living things produce. That is, after all, what we do. But what does it mean to feed on sunlight, as phototrophs do? Or, even stranger, to feed on rocks, as lithotrophs do? Where is the food, for example, in the mixture of chemicals (H2S, H2, CO, Mn+, Fe2+, Ni2+, CH4, and NH4 +) that spews from a hydrothermal vent?
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