Whether using a food crop as a source of biofuels is environmentally sustainable would depend upon all of the following, EXCEPT ________
A) the corporate profits that would be made
B) the amount of fertilizers used and their impact on aquatic ecosystems
C) the amount of pesticides used and their impact on biodiversity and groundwater
D) the impact on food supplies and prices
E) the amount of water and land necessary for the crops
Answer: A
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If the masses of two planetary bodies double, and the distance between them also doubles, the force between them would be
A. half as much. B. one-quarter. C. twice as much. D. none of the above
A rock with only 25% of the parent isotope left has been decaying for time equal to ________ half-lives.
A. five B. four C. one D. three E. two
A sequence of how many bases is needed to code for an amino acid?
A) 1 B) 2 C) 3 D) 4
To halt a pyroclastic flow, one could use many of the same techniques as are used for lava, because both are flowing fluids.
Answer the following statement true (T) or false (F)