Over the Past Century, Sagebrush Has Dramatically Expanded Its Range

question 65

Multiple Choice

Over the past century, sagebrush has dramatically expanded its range over the Colorado plateau's grasslands. This development has been attributed to the overgrazing of the area's grasses by cattle and sheep. This example indicates that

• A) sagebrush is the dominant competitor over grasses.
• B) the relationship between sagebrush and grasses is mutualistic.
• C) sagebrush could not exist anywhere in the absence of cattle and sheep.
• D) the range of sagebrush is normally limited by competition with grasses.
• E) grazing has no effect on the distribution of plants.

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Definitions:

Agency Shop

Union security arrangement that requires the payment of union dues but not union membership.

Taft-Hartley Act

A 1947 federal law in the United States that restricts the activities and power of labor unions.

Unfair Labor Practice

Actions by employers or labor unions that violate the rights of workers or the regulations governing labor relations.

Closed Shop

Union security arrangement under which a person must be a union member before being hired; illegal for those covered by the National Labor Relations Act.