Mass Extinctions

question 67

Multiple Choice

Mass extinctions

• A)remove many species,but they are usually replaced within a million years or less by an even greater diversity of life.
• B)are caused by human activity and did not occur prior to the expansion of the Earth's human population.
• C)remove well- adapted species and groups from the Earth,so that it may take millions of years for species diversity to recover.
• D)mainly serve to "weed out" poorly adapted organisms and make room for new,better adapted species.

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Definitions:

Treasury Stock

Treasury stock includes shares that have been originally issued and then bought back by the issuing corporation, thereby decreasing the total number of outstanding shares available on the public market.

Cumulative

Describes an amount that has accumulated over time, often referring to the total up to a particular point.

Capital Stock

The total amount of a company's shares authorized and issued to shareholders, representing the primary source of equity financing.

Common Stock

Equity ownership in a corporation, representing a claim on a portion of the profits and assets, with voting rights in corporate decisions.