The "Trail of Tears" is an example of
A) eco-migration.
B) asylum seeking.
C) refugee migration.
D) internal voluntary migration.
E) internal forced migration.
Answer: E
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Instructions: Choose one answer from each pair of selections. Wind direction is given as the direction TOWARDS | FROM which it is blowing
Complete the following nuclear equation:
Tl ? 
Pb + ??
A. 
e
B. gamma ray
C. 
He
D. both A and B
E. none of the above
Which of the following is NOT a source of material for soil?
A. CO2 gas from roots B. leaves and other plant debris C. weathered rock and sediment D. water from precipitation and snowmelt E. All of these are a source of material in soil.
Which of the following would not be true of a tropical rain forest?
a. low net primary productivity b. little ground level vegetation c. low levels of ground level sunlight d. high biodiversity e. high humidity