The introduction of genetically modified (GM) crops into developing nations needs to be monitored because
A) many GM seeds are more costly or require substantially greater costs to grow.
B) most GM crops do not thrive in tropical environments.
C) many farmers make high profits from GM crops, sell their farms, and move to cities.
D) GM seed providers cannot make a profit in developing nations because of theft and piracy.
A
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A crate is at rest on a horizontal floor. The friction force acting on the crate is
A. between zero and the weight of the crate. B. equal to the weight of the crate. C. zero. D. none of the above
Desert soils that form on parental material containing virtually no calcite receive their calcium from
A) animal droppings. B) the asthenosphere. C) the lithosphere. D) the atmosphere.
Instructions: Choose one answer from each pair of selections. The largest diurnal temperature ranges would usually be observed in a(n) RURAL | URBAN area
Which technique is an example of a low-tech method that may be used to conserve water in developing countries?
A. drip irrigation B. planting deep-rooted perennial crop varieties C. low-energy, precision application sprinkler D. center-pivot sprinkler E. flood irrigation