Over the Past Century, Sagebrush Has Dramatically Expanded Its Range

question 6

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

Identify factors that influence changes in the unemployment rate.

Describe different types of unemployment (frictional, structural, cyclical, seasonal).

Understand the economic and social costs of unemployment.

Recognize how government statements about employment need to be interpreted in context.

---

Definitions:

Brain Scans

Medical imaging techniques used to view the brain for diagnostic and research purposes, such as MRI or CT scans.

Deoxyribonucleic Acid

DNA; the molecule that contains the genetic instructions for the development and function of living things.

Ribonucleic Acid

A nucleic acid present in all living cells. Its principal role is to act as a messenger carrying instructions from DNA for controlling the synthesis of proteins.

Antidiuretic Hormone

Also known as vasopressin, it is a hormone that helps to control the body's water balance through its effect on the kidneys and reduction of urine output.