The ocean floor topography is
A) smooth.
B) varied.
C) flat.
D) unknown.
B
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Fairly diverse second- and third-growth forests now exist in all parts of the United States except the
a. East b. West c. North d. South e. Northeast
Forests do NOT
A) store carbon that otherwise would be in the atmosphere. B) absorb carbon dioxide and release oxygen. C) reduce erosion and aid in flood prevention. D) cover only 3 percent of the Earth's surface.
The presence of seabirds is a good indicator of ________.
A. cold water B. high productivity C. the presence of land D. marine pollution
Why must carbohydrates, fats and proteins be broken down into small molecules?
A) So they can be absorbed through the walls of the stomach. B) So they can be absorbed through the walls of the intestines. C) So they can be properly excreted. D) So we can enjoy their tastes and aromas.