One of the most common sources of phosphate pollution that has led to eutrophication resulted from the use of
A) dishwashing detergents.
B) gasoline additives.
C) toothpastes.
D) artificial sweeteners.
A
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Advocates for the development and use of genetically modified organisms (GMOs) argue that
A. honeybee survival could be negatively impacted. B. this method offers promise for solving the world's erosion problems. C. super weeds could develop from introducing herbicide resistance genes. D. this method offers promise for solving world hunger problems by increasing crop production.
Brownouts and blackouts involve drops in voltage to complete losses of electrical power, often occurring when electrical demand exceeds supply
As demands for electricity push beyond the capacity of the existing power grid in the United States, when is it most likely that a brownout or blackout will disrupt electricity to your home computer? A) During a weekday in the summer B) During a weekend in the winter C) During a weekend in the summer D) During a weekday in the winter
Which of the following has a primary amine as part of its structure?
A) guanine B) thymine C) uracil D) none of these
Coal is formed from
A. heavy oils like asphalt. B. the remains of marine microorganisms. C. graphite under high pressure. D. the remains of land plants.