Here's a breakdown:
* Autotrophs: Organisms that can produce their own food from inorganic substances.
* Chemosynthesis: The process of using energy from inorganic compounds, like hydrogen sulfide (H₂S), methane (CH₄), or ammonia (NH₃), to produce organic compounds.
Examples of chemosynthetic organisms:
* Bacteria: Some bacteria in deep-sea vents or hydrothermal springs utilize chemosynthesis to survive.
* Archaea: Certain archaea use chemosynthesis in environments with high concentrations of methane or hydrogen sulfide.
Key difference from photosynthesis:
* Photosynthesis uses light energy to convert carbon dioxide and water into glucose and oxygen.
* Chemosynthesis uses energy from inorganic compounds to produce organic compounds.
In essence, chemosynthesis is a process that allows certain organisms to thrive in environments where sunlight is not available.