Following World War II, American scientists made a critical contribution to the development of penicillin by
A. discovering it could be used to treat streptococcal blood infections.
B. discovering the antibacterial properties for which the drug was named.
C. first using the antibacterial agent known as sulfanilamide.
D. demonstrating the value of antiseptic solutions to prevent infection.
E. developing methods for its mass production and commercial distribution.
Answer: E
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Hitler took Poland in 1939
A) despite interference by the Soviet Union. B) in a long protracted struggle that cost Germany dearly. C) upon Poland's request for a restructured government. D) using "lightning war" tactics and with active support from Joseph Stalin. E) peacefully, with the reluctant acquiescence of Britain and France.
The introduction of the stirrup had a profound impact on western European warfare
a. True b. False Indicate whether the statement is true or false
Although unintended, one result of the 1968 Revolution's nationalist ideology was
A) a consolidation of political power in working class trade union organizations. B) popular political mobilization and artistic explorations of indigenous and African roots. C) increasing public political support for the policies of neoliberalism. D) a decline in the power of highland community indigenous identities.
When did universities become the leading center of scientific research?
A) Nineteenth century B) Eighteenth century C) Seventeenth century D) Sixteenth century E) Twentieth century