Anaerobic conditions will most likely be generated in a natural water system with
A) high levels of DO that is contaminated by pollutants with high BOD values.
B) low levels of DO that is contaminated by pollutants with high BOD values.
C) high levels of DO that is contaminated by pollutants with low BOD values.
D) low levels of DO that is contaminated by pollutants with low BOD values.
B
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Organisms with opportunistic reproductive strategies generally
A. have a low biotic potential. B. are small and short-lived. C. give significant parental care to its offspring. D. are not very adaptable to change. E. are large and long-lived.
Which of the following is an accurate statement about polar climates?
A. They extend far to the south of the Arctic circle. B. They are characterized by strong low-pressure systems. C. They have little precipitation. D. They are a source of cT air masses.
The island nations of the world face the real possibility that their coastal areas will become uninhabitable because of
A. pollution from container and cruise ships. B. the accumulation of non-biodegradable disposable packaging. C. increased volcanic activity. D. climate change and the melting of Antarctica's ice.
Why are the melting points of cis-unsaturated fatty acids lower than those of trans-unsaturated fatty acids?
A) The cis-unsaturated fatty acid chains are shorter. B) The trans-unsaturated fatty acid chains pack together in close parallel alignment. C) The cis-unsaturated fatty acid chains have stronger London dispersion forces. D) All three factors (a)-(c) are important.