Chemosynthesis and photosynthesis are both carbon-fixing metabolic modes, but chemosynthesis uses chemical (inorganic) energy sources instead of light.
Chemosynthetic organisms (e.g., sulphur- and methane-oxidizing bacteria at hydrothermal vents) fix carbon using energy released from oxidizing inorganic compounds (H2S, CH4, NH3, Fe2+) rather than...
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