The Mass Extinction During Late Devonian, Which Is Related to Global

question 9

Multiple Choice

The mass extinction during Late Devonian, which is related to global collapse of the coral-strome reef systems and loss of other prominent taxa, was caused largely by

• A) an unexplained short-term dimming of the Sun.
• B) formation of Earth's first widespread forests.
• C) glaciers spreading over a portion of southern Gondwanaland.
• D) global warming due to injection of carbon dioxide into the atmosphere.

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Definitions:

Opportunity Cost

The loss of potential gain from other alternatives when one alternative is chosen; the value of the next best alternative foregone.

Specialization

The process of focusing on and becoming expert in a particular subject or skill.

Production

The process of creating goods and services by combining labor, land, and capital to generate output.

Comparative Advantage

A person's, corporation's, or country's capability to manufacture a good or provide a service with a smaller opportunity cost than that of its competitors.