Ozone is destroyed by CFCs because the ________ in the CFCs combines with oxygen
A) carbon dioxide
B) dust
C) fluorine
D) liquids
E) chlorine
Answer: E
Environmental & Atmospheric Sciences
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An RNA transcript constructed from the DNA sequence ATTGC would have the nucleotide sequence
A) ATTGC. B) AUUGC. C) UAACG. D) TAACG.
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Soft-bodied organisms are never preserved in the fossil record. Indicate whether the statement is true or false
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An El Nino event is likely to be associated with
A. cooler surface waters in the Pacific. B. increased upwelling. C. changes in paths and intensities of Pacific storms. D. All of the choices are correct.
Environmental & Atmospheric Sciences
The forced collectivization of agriculture brought about a devastating famine in 1932-33, in which between six and eight million people starved to death.
a. true b. false
Environmental & Atmospheric Sciences