Bacteria and fungal spores are potential ________
A) problems in degrading the ozone layer
B) causes of "sick building syndrome"
C) sources of radon in the home
D) causes of high pesticide use in the home
E) volatile organic compounds (VOCs) and persistent organic pollutants (POPs)
Answer: B
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Which of the following eruptive materials can be described as basaltic, vesicular ejecta found around cinder cone volcanoes?
A) Tuff B) Scoria C) Lapilli D) Pumice
The Houthi militants in Yemen are largely supported by which nation?
A) Egypt B) Saudi Arabia C) Russia D) Israel E) Iran
Which of the following connects points of equal atmospheric pressure?
A) isohyets B) isobars C) isotherms D) isotachs
Folk music in North America began as the result of what type of diffusion from the Old World?
A. expansion diffusion B. hierarchical diffusion C. relocation diffusion D. cascade diffusion