Imagine that you discover a microbial deep-sea organism that can derive energy from (inorganic) hydrogen gas (H2). In addition, this microbe can synthesize organic compounds from carbon-containing inorganic molecules in the ocean. This microbe is a:

Answer: Chemoautotroph

Explanation:

Chemotrophs can be defined as the organism that obtain energy by oxidation of electrons donors that is present in the environment.

These molecules can be organic or inorganic. It can either autotrophs or heterotrophs.

These organism cannot use carbon dioxide to form their own organic compound. Their carbon source is derived from sulfur, lipids, proteins and carbohydrates.