The ozone hole is an actual hole in the atmosphere, a region of complete vacuum
a. True
b. False
ANSWER: False
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Which of the following describes the large ribosomal unit of prokaryotes?
A) one molecule of rRNA and approximately 20 different proteins B) one molecule of rRNA and approximately 35 different proteins C) two molecules of rRNA and approximately 20 different proteins D) two molecules of rRNA and approximately 35 different proteins
What new technology has revolutionized the natural gas scene in the United States?
What will be an ideal response?
Red color in soils results from
A. solution of quartz. B. hydrolysis of feldspar. C. oxidation of iron. D. solution of calcite.
Approximately how many Southeast Asian women are employed in the "Maid Trade" in Hong Kong?
A) 500,000 B) 300,000 C) 250,000 D) 175,000 E) 75,000