Epidemiological investigations depend on being able to link a number of instances of an infection to ___________.
A) multiple people.
B) multiple locations.
C) a common source.
D) a common state in the US.
C) a common source.
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Staphylococcus aureus produces ________, leading to fibrin clots that protect them from attack by host cells
A) collagenase B) coagulase C) lipase D) amylase
HIV-1 Group M is responsible for 95% of human infections. When is it estimated that HIV-1 Group M was transferred to humans?
A) 1980 B) 1960 C) 1930 D) 1995 E) 1900
Which of the following groups do not contain any species that are autotrophs?
A. Archaea B. Bacteria C. Plants D. Fungi E. Protista
The most important evidence that Darwin used to develop his theory of natural selection came from ____.
A. the Argentine pampas B. his boyhood neighborhood in England C. the Galápagos Islands D. Australia and New Zealand E. South America