Malaria is spread by ____.
A. snails
B. flies
C. contaminated feces
D. certain types of mosquitoes
E. bacteria
Answer: D
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Nanotechnologists envision that in the future garbage can be turned into edible food
Indicate whether the statement is true or false
As surface air rushes in toward the eye of a hurricane, the air expands and should cool. Which of the following is the main reason the surface air does not cool around the eye?
A. The sinking air near the eye warms the air. B. The warm water heats the air. C. Sunlight heats the air. D. Friction with the water adds heat to the air.
The methods of microbiological analysis are needed to test water for
A) eutrophicant fertilizers. B) fecal coliform contamination. C) oil pollution. D) oxygen levels.
Improved insulation, energy efficient windows and curtains, and caulking and sealing cracks could reduce commercial building and household energy loss by up to ________ percent.
A. 20 B. 10 C. 50 D. 30