Hydrogen sulfide will be identifiable by its distinctive odor.
about 60% of radioactivity is found in phosphorylated compounds characteristic for the reductive pentose phosphate cycle.
In photosynthesis, plants grow in sunlight, capturing solar energy to make organic matter.
In chemosynthesis, bacteria grow in mineral-rich water, harnessing chemical energy to make organic material.
In 1880, the Russian scientist Sergei Winogradsky discovered the bacteria Beggiatoa.
These bacteria metabolize hydrogen sulfide to produce the energy for making carbohydrates.
Chemosynthesis is the use of energy released by inorganic chemical reactions to produce food.
It is analogous to the more familiar process of photosynthesis.
Unlike photosynthesis, chemosynthesis requires no light and can occur at the extreme temperatures and high pressures of the deep ocean.
The chemosynthetic food web supports dense populations of uniquely-adapted organisms.