Phytoplankton use all of the following as part of the cell structure except ________.

A. cellulose
B. iron
C. calcium carbonate
D. silica


Answer: B

Environmental & Atmospheric Sciences

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The Glacier Park, Montana area, provides a classic example of large scale ________

A) flood basalts B) transcurrent faulting C) graben structure D) overthrust faulting E) horsts

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Important tools in prairie restoration include

A. fire and bison. B. fire. C. volcanic eruptions. D. bison.

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Fortunately for life, oxygen levels in the atmosphere have been stable over Earth’s history

a. True b. False

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Compared to today, sea level 125,000 years ago (in an interglacial part of the Pleistocene) was ________

A) lower B) higher C) about the same D) lower by more than 100 meters E) static (all the water was frozen)

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