Planting crops in alternating rows of close-growing plants
A. creates windbreaks.
B. is called strip cropping.
C. is called crop rotation.
D. increases erosion rates.
E. decreases soil's water holding capacity.
Answer: B
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What is the main impediment to widespread use of geothermal energy to heat and cool buildings?
A. high cost B. limited geographic availability C. lack of technological understanding D. high environmental impact
Although primary productivity in tropical areas is generally low, which of the following tropical locations have unusually high primary productivity rates?
A) Equatorial downwelling zones B) Coastal upwelling zones C) Hypoxic zones D) Dead zones
In the middles of the oceans, high tides can best be described as ________
A) steep-sided mounds B) ridges C) currents D) waves E) bulges
Pesticides used in food production are regulated in the U.S. entirely by the Food and Drug Administration.
Answer the following statement true (T) or false (F)