Following the Reptilian Extinctions at the Close of the Mesozoic

question 14

Multiple Choice

Following the reptilian extinctions at the close of the Mesozoic, two groups of mammals, the marsupials and______ , evolved.

• A) stromatolites
• B) placentals
• C) eukaryotes
• D) cephalopods
• E) trilobites

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Definitions:

David Ricardo

A British economist known for his theories on comparative advantage and rent, significantly influencing the field of economics.

Adam Smith

An 18th-century Scottish economist and philosopher best known for his work "The Wealth of Nations," which laid the foundation for classical economics and the concept of the invisible hand guiding free markets.

Absolute Advantage

The ability of an individual, company, or country to produce a good or service at a lower cost per unit than competitors.

Comparative Advantage

Comparative Advantage is the ability of an individual, company, or country to produce a good or service at a lower opportunity cost than its competitors.