The Mass Extinction of Dinosaurs and Other Animals at the End

question 9

Multiple Choice

The mass extinction of dinosaurs and other animals at the end of the Cretaceous period is believed by most scientists to have been caused by

• A)a massive asteroid or comet impact.
• B)a massive volcanic eruption.
• C)gamma radiation released from a supernova explosion.
• D)overhunting by expanding populations of Neolithic humans.

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Definitions:

Price Searcher

A firm that determines the price of its products with some degree of market power, usually by differentiating its products from those of competitors.

Marginal Revenue

Incremental income earned by selling an additional unit of a good or service.

Marginal Cost

The rise in expenses associated with the production of an extra unit of a product or service.

Price-searcher Firm

A company that determines the price of its products based on demand and supply conditions rather than prevailing market prices.