Bacterial Activity in Earth's Crust May Have Deposited Most of the Gold

question 59

Multiple Choice

Bacterial activity in Earth's crust may have deposited most of the gold through the process of:

• A) reduction of hydrosoluble Au³⁺
• B) oxidation of Au³⁺
• C) oxidation of gold ores
• D) all of the above
• E) none of the above

---

Definitions:

Economic Development

The process by which the overall health, well-being, and academic level of a population in a specific area is improved through targeted policies and projects.

Birth Rate

The number of live births per thousand people in a population over a specific period of time.

City Centers

Central areas of cities that often contain a concentration of cultural, commercial, and civic activities.

Total Fertility Rate

The average number of children that would be born to a woman over her lifetime under current age-specific fertility rates.