Carbon Dioxide Fixation in the Dark Ocean
These species are called "autotrophs'" The most familiar are the plants. As most of you know, plants can grow quite successfully in a glass of water (with minerals). Animals are the most obvious example of "heterotrophs," species that need to be supplied with complex organic molecules in order to survive. We can't survive on water alone. We need to get sugars and a host of other compounds from eating other (mostly dead) species.
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