AP BIOLOGY

Detailed explanation-1: -Chemoautotrophs are able to synthesize their own organic molecules from the fixation of carbon dioxide. These organisms are able to produce their own source of food, or energy. The energy required for this process comes from the oxidation of inorganic molecules such as iron, sulfur or magnesium.

Detailed explanation-2: -Those that synthesize food through the use of chemical energy are referred to as chemoautotrophs. Chemoautotrophs are those that make their own food by chemosynthesis. Chemosynthesis is a process by which some organisms, such as certain bacteria, use chemical energy to produce carbohydrates.

Detailed explanation-3: -All known chemoautotrophs are prokaryotes, belonging to the Archaea or Bacteria domains. They have been isolated in different extreme habitats, associated to deep-sea vents, the deep biosphere or acidic environments. This form of energy conservation is considered one of the oldest on Earth.

Detailed explanation-4: -Most chemoautotrophs are extremophiles, bacteria or archaea that live in hostile environments (such as deep sea vents) and are the primary producers in such ecosystems. Chemoautotrophs generally fall into several groups: methanogens, sulfur oxidizers and reducers, nitrifiers, anammox bacteria, and thermoacidophiles.

Detailed explanation-5: -Iron bacteria, Ferrobacillus-They derive energy by oxidizing dissolved ferrous ions and are chemoautotrophs.