Tropical rainforests consist primarily of ____
a. grasses
b. broad-leaf evergreen trees
c. xerophytic vegetation
d. shrubs
b
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Explain why it is often windy at the beach. What forces are responsible, and how do beachfront conditions differ from conditions farther inland?
What will be an ideal response?
Ozone, when found close to the surface of the earth, is a pollutant.
Answer the following statement true (T) or false (F)
Under U.S. immigration policies
A) refugees receive special priority over economic migrants. B) economic migrants are expedited across borders to ensure their skills contribute quickly to the economy. C) refugees and economic migrants are treated the same. D) economic migrants are allowed only if they don't send remittances. E) economic migrants are allowed only if they can prove there were no jobs available in their country of origin.
Construction of a dam results in
A. increased erosion by clear water released from the dam. B. an increase in the total amount of water flowing downstream of the dam. C. the dam releasing water that contains more sediment than carried by the river before the dam was constructed. D. increased erosion where the stream channel meets the reservoir.