Question

Photosynthesis cycles matter and energy from the sun in most environments. Explain what chemosynthesis is, and how it cycles matter and energy in extreme environments. Make sure to explain how it can support the transport of matter and energy through a food chain. Explain your answer in 1-2 sentences.

Answer 1

Chemosynthesis is the process by which certain microbes (bacteria and archaea) derive energy from the oxidation of inorganic chemicals—such as hydrogen sulfide, methane, or ferrous iron—to fix CO2 into organic matter in lightless, extreme environments (e.g., deep-sea hydrothermal vents, cold seeps, subsurface). Those chemosynthetic microbes act as primary producers, converting inorganic compounds into biomass that is eaten by higher organisms, thereby moving matter (carbon and nutrients) and chemical energy up the food chain while recycling inorganic substrates via redox reactions.