Rising sea level since the Pleistocene has played a major role in the formation of ____
a. barrier islands
b. barrier beaches
c. longshore bars
d. lagoons
a
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Joyce Kilmer Forest in western North Carolina contains a stand of trees that have never been logged. Some of the trees are over 400 years old and 20 feet in circumference. Which describes this type of forest?
A. old-growth B. tree farm C. second-growth D. commercial
Tower karst is most common in:
a. high latitudes. b. humid midlatitudes. c. humid tropics. d. caverns. e. tropical deserts.
Net energy yields are important in evaluating energy resources. What other factors that should be considered in determining how much useful energy a resource actually provides?
What will be an ideal response?
Why do countries with age-structure distributions similar to the leftmost type in Figure 2.11 ("Expanding Rapidly") have rapid population growth rates?
A. They have large numbers of girls who are about to become sexually mature B. Most people in these countries are older than 15 years C. Women older than 35 years are having more children in these countries D. They have a larger ecological footprint