What proportion of sulfur compounds in the atmosphere come from natural sources?
A) 1/10
B) 1/5
C) 1/3
D) 2/3
Answer: D
Environmental & Atmospheric Sciences
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Dry climates are always at low latitudes (within 10° of equator)
Indicate whether the statement is true or false
Environmental & Atmospheric Sciences
Approximately how old is the oldest oceanic crust?
A. 200 million years old B. 2 million years old C. 20 million years old D. 2 billion years old
Environmental & Atmospheric Sciences
Which continent contains 60% of the world's population?
A) Asia B) Africa C) North America D) South America E) Africa
Environmental & Atmospheric Sciences
Which of the following is true of pyruvate kinase?
A) It is activated by AMP. B) It plays a key regulatory role in glycolysis. C) both a and b D) neither a nor b
Environmental & Atmospheric Sciences