How Did an Oxygen-Rich Atmosphere Develop from a Carbon Dioxide-Rich

question 121

Multiple Choice

How did an oxygen-rich atmosphere develop from a carbon dioxide-rich atmosphere?

• A) Through photosynthesis by cyanobacteria
• B) Through volcanic eruptions
• C) Through asteroid impacts

---

Definitions:

Producer Surplus

The difference between the amount producers are willing to supply a good for and the actual amount they receive when the good is sold.

Producer Surplus

The gap highlighting the difference between the initial asking price by sellers for goods or services and the ultimately received price.

Specific Tax

A tax that is levied as a fixed amount per unit on a particular good or service.

Inelastic Demand

A situation where demand for a product or service is relatively unmoved or less sensitive to changes in price.