Of the following goals listed, which are the two goals of epidemiology?
I. isolate the infectious pathogen for study and vaccine creation
II. describe the nature, cause, and extent of new or existing diseases in populations
III. identify patient zero and how the initial infection occurred
IV. intervene to protect and improve health in populations
V. distribute vaccines so that future outbreaks do not occur
A) I and II B) III and IV C) III and V D) I and III E) II and IV
Answer: E
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The cascade of events determining whether bacteriophage lambda elects to purpose lysogeny or a lytic cycle begins with a race between the production of the lambda repressor and ________.
A. endolysin B. Cro protein C. N protein D. integrase
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Which of the following is associated with r-selected species?
a. They have large numbers of large offspring. b. They have small numbers of small offspring. c. They have large numbers of small offspring . d. They have small numbers of large offspring
During inhalation, air moves from the pharynx directly into the trachea. Indicate whether the statement is true or false