Unconventional (noncriteria) pollutants are characterized by all of the following except
A. they are not yet regulated by the EPA.
B. they are considered particularly toxic or dangerous.
C. they include mercury and organic compounds.
D. they have anthropogenic sources.
Answer: A
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Which of the following is the mechanism of peptide bond formation during protein synthesis?
A) Nucleophilic attack on the carbon of a carbonyl group by an amino group. B) Nucleophilic attack on the nitrogen of an amino group by the carbon of a carbonyl group. C) Nucleophilic attack on the nitrogen of an amino group by the oxygen of a carbonyl group. D) Nucleophilic attack on the oxygen of a carbonyl group by an amino group.
What term describes how fast a radioactive element decays?
A. Radiation B. Atomic Number C. Half-life D. Biogeography
Due to the arrangement of weaker bonds in their crystal lattice, the tendency of certain minerals to break along smooth, parallel planes is known as ________
A) streak B) cleavage C) luster D) crystal habit
The annual temperature range of places located in the interior of a continent is ________ those located along the coast at the same latitude
A) greater than B) less than C) the same as