Carcinogens are substances that cause
A. A sensitized reaction
B. Birth defects
C. Immune responses
D. Out-of-control cell growth and tumors
E. Carcinogens can cause all of these reactions
Answer: D
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Fission and fusion reactions
A) convert a tiny amount of the mass of the nuclear materials to energy. B) convert energy to the mass of the nuclear materials. C) release energy without a change in the mass of the nuclear materials. D) invest energy to generate nuclear materials.
Recent studies indicate that two of the most dangerous components of air pollution in and around major cities in the United States are
A) fine particles and sulfur pollution. B) carbon monoxide and ozone. C) lead and volatile organic compounds. D) radon and carbon monoxide.
How is climate change affecting the natural environment and indigenous cultures of northern Quebec at the present time?
What will be an ideal response?
The accompanying graph shows the number of Atlantic hurricanes since the 1880s. Based on when most global warming has occurred, one would conclude
A. no trends are apparent from this graph. B. short duration hurricanes have increased in frequency. C. all hurricanes have increased in frequency. D. moderate duration hurricanes have increased in frequency.