Question

Thermus aquaticus is a species of bacteria found living in the hot springs in Yellowstone National Park. Hot springs typically are areas characterized by low oxygen levels, low light levels and high concentrations of sulfur and calcium carbonate.
In what way do bacteria living in or near hot springs most likely make food?

• A. Through the process of photorespiration by using oxygen and light energy to produce carbon dioxide.
• B. Through the process of radiosynthesis by using gamma radiation and melanin to create energy for growth.
• C. Through the process of photosynthesis by using energy from the sun, water and carbon dioxide to make glucose.
• D. Through the process of chemosynthesis by combining hydrogen sulfide with oxygen and carbon dioxide to make carbohydrates.

Answer 1

The correct option is D Through the process of chemosynthesis by combining hydrogen sulfide with oxygen and carbon dioxide to make carbohydrates.

Thermus aquaticus is a species of bacterium which lives in the hot springs. The level of oxygen and light is lower in the hot springs. This bacterium can perform chemosynthesis. The sulfur in the water reacts to form hydrogen sulfide which can be oxidized for energy. The carbon dioxide from the calcium carbonate can be used for the preparation of carbohydrates.

Thus, the correct answer is option D.