____ ecosystems seem to be particularly sensitive to changes in acidity
a. Freshwater
b. Marine
c. Forest
d. Grassland
e. Alpine
ANSWER: a
Environmental & Atmospheric Sciences
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What will be an ideal response?
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A. secondary-growth. B. old-growth. C. tree plantations. D. clear cut. E. protected.
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An example of an energy efficient window is a ______________ ______________ window
Fill in the blanks with correct word
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Compared to the population of the former Soviet Union, Russia's population today is
A. similar to the largest of the former republics B. about half of the former Soviet Union C. only slightly larger than Uzbekistan D. still overwhelming at about 80% of the original land empire
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