The Oak Tree Pathogen That Causes Sudden Oak Death, Phytophthora

question 30

Multiple Choice

The oak tree pathogen that causes sudden oak death, Phytophthora ramorum, has dispersed 800 kilometers in 15 years. West Nile virus spread from New York State to 46 other states in 5 years. Which of the following best explains the difference in the rate of spread of these two pathogens?

• A) the lethality of each pathogen
• B) the mobility of their hosts
• C) the fact that viruses are very small
• D) innate resistance

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Definitions:

Medical Model

A framework for explaining illness and disability in purely biological terms and focusing on diagnosis, treatment, and cure.

Medical Model

A framework for understanding diseases and disorders focusing on biological factors and excluding psychological, environmental, and social influences.

Etiology

The apparent causation and developmental history of an illness.

Deviant

Behavior or actions that diverge significantly from societal or cultural norms.