At the End of the _______ Period, Atmospheric Oxygen Concentrations

question 32

Multiple Choice

At the end of the _______ period, atmospheric oxygen concentrations decreased from about 30 percent to 15 percent due to plant death associated with the widespread drying of swamps.

• A) Cambrian
• B) Cretaceous
• C) Permian
• D) Devonian
• E) Tertiary

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Definitions:

Opportunity Cost

Loss of potential earnings from different choices when one is picked.

Employment Discrimination

It refers to unfair or unequal treatment of an individual or group based on characteristics such as race, gender, age, religion, or disability in the workplace.

Underemployment

A situation in which workers are employed less than they wish or are overqualified for their jobs, resulting in their skills being underutilized.

Production Possibilities Frontier

A curve depicting the maximum viable combination of two products that can be produced in an economy, assuming all resources are fully and efficiently utilized.