Problem: Infection:

Persistent infections occur because the body is unable to clear the organism after the initial infection. Persistent infections are characterized by the continual presence of the infectious organism, often as latent infection with occasional recurrent relapses of active infection. There are some viruses that can maintain a persistent infection by infecting different cells of the body. Some viruses once acquired never leave the body. A typical example is the herpes virus, which tends to hide in nerves and become reactivated when specific circumstances arise.

Where does the herpes virus avoid?
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A: unanswerable


Problem: Houston:

Houston has mild winters in contrast to most areas of the United States. In January, the normal mean temperature at Intercontinental Airport is 53.1 °F (11.7 °C), while that station has an average of 13 days with a low at or below freezing. Snowfall is rare. Recent snow events in Houston include a storm on December 24, 2004 when one inch (2.5 cm) of snow accumulated in parts of the metro area. Falls of at least one inch on both December 10, 2008 and December 4, 2009 marked the first time measurable snowfall had occurred in two consecutive years in the city's recorded history. The coldest temperature officially recorded in Houston was 5 °F (−15 °C) on January 18, 1940. Houston has historically received an ample amount of rainfall, averaging about 49.8 in (1,260 mm) annually per 1981–2010 normals. Localized flooding often occurs, owing to the extremely flat topography and widespread typical clay-silt prairie soils, which do not drain quickly.

What is the usual mean temperature in Houston?
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A: 53.1 °F


Problem: Dwight D. Eisenhower:

On the whole, Eisenhower's support of the nation's fledgling space program was officially modest until the Soviet launch of Sputnik in 1957, gaining the Cold War enemy enormous prestige around the world. He then launched a national campaign that funded not just space exploration but a major strengthening of science and higher education. His Open Skies Policy attempted to legitimize illegal Lockheed U-2 flyovers and Project Genetrix while paving the way for spy satellite technology to orbit over sovereign territory, created NASA as a civilian space agency, signed a landmark science education law, and fostered improved relations with American scientists.

Along with the U-2 flyovers, what did Eisenhower try to legitimize with the Open Skies Policy?
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A: Project Genetrix


Problem: Uranium:

In 1972, the French physicist Francis Perrin discovered fifteen ancient and no longer active natural nuclear fission reactors in three separate ore deposits at the Oklo mine in Gabon, West Africa, collectively known as the Oklo Fossil Reactors. The ore deposit is 1.7 billion years old; then, uranium-235 constituted about 3% of the total uranium on Earth. This is high enough to permit a sustained nuclear fission chain reaction to occur, provided other supporting conditions exist. The capacity of the surrounding sediment to contain the nuclear waste products has been cited by the U.S. federal government as supporting evidence for the feasibility to store spent nuclear fuel at the Yucca Mountain nuclear waste repository.

Where in the United States is there a nuclear waste repository?
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A:
Yucca Mountain