AP BIOLOGY

Detailed explanation-1: -Chemosynthetic organisms are autotrophs capable of obtaining energy to make their organic food by oxidizing high-energy inorganic compounds (hydrogen gas, ammonia, nitrates, and sulfides). On Earth, chemosynthetic ecosystems include hot vents, cold seeps, mud volcanoes and sulfidic brine pools.

Detailed explanation-2: -Chemoautotrophic bacteria fix carbon dioxide using the energy and the reductant derived from the oxidation of reduced (usually inorganic) compounds, generally with molecular oxygen as the electron acceptor.

Detailed explanation-3: -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-4: -Chemoautotrophic nutrition means the energy derived from chemical reactions that take place. During this mode of nutrition, organisms use inorganic compounds to synthesise several organic compounds with the existence of carbon atoms. Those organisms that possess such a mode of nutrition are known as chemoautotrophs.

Detailed explanation-5: -Some examples of chemoautotrophs are Nitrobacter, Nitrosomonas and Sulphur bacteria.