AP BIOLOGY

Detailed explanation-1: -They oxidize hydrogen sulfide, add carbon dioxide and oxygen to produce sugar (food), sulfur, and water. The food that chemosynthetic bacteria produce serves as the base of the hydrothermal vent food web. The food the bacteria makes is shared with the host organism, and in return the bacteria has a safe home.

Detailed explanation-2: -Some rare autotrophs produce food through a process called chemosynthesis, rather than through photosynthesis. Autotrophs that perform chemosynthesis do not use energy from the sun to produce food. Instead, they make food using energy from chemical reactions, often combining hydrogen sulfide or methane with oxygen.

Detailed explanation-3: -Chemosynthesis is the synthesis of organic compounds by bacteria or other living organisms using energy derived from reactions involving inorganic chemicals, typically in the absence of sunlight.

Detailed explanation-4: -Chemosynthesis is the conversion of carbon (usually carbon dioxide or methane) into organic matter using inorganic molecules (hydrogen or hydrogen sulfide) or methane as an energy source. Most energy is initially derived from sunlight via plant photosynthesis.