Gypsum: Sedimentary rock composed of calcium sulfate. Heterotroph: An organism that cannot fix inorganic carbon, and therefore uses pre-formed organic carbon for growth. Karst formations ...
Autotroph: As opposed to "heterotroph" and "chemo-autotroph", an organism that has the ability to harvest sunlight as a source of chemical energy. Benthos: The collective group of organisms that ...
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