What caused the dramatic decline in Guam's native bird species?
A) the thinning of their eggshells and the subsequent death of their young as a result of
heavy DDT use on the island in the 1970s
B) radiation poisoning caused by nuclear tests of the United States and France
C) climatic change in the region
D) the elimination by humans of its food supply
E) the accidental introduction of the non-native brown tree snake
E) the accidental introduction of the non-native brown tree snake
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Which of the water columns would experience the greatest temperature differences with depth?
A) A
B) B
C) C
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