Food security has to do with
A. A country's dependence on cash crop exports.
B. Preventing wars over diminishing food supplies.
C. The total volume of food a country imports.
D. The total volume of aid a country receives.
E. The ability of a population to obtain food on a day-to-day basis.
Answer: E
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Which of the following has been used to reconstruct past climates?
a. analysis of air bubbles trapped in ice b. study of documents describing floods, droughts and crop yields c. the ratio of oxygen 18 to oxygen 16 in the shells of marine organisms d. study of geologic formations e. all of the above
Complete the concept map by selecting the correct responses from the lists provided. 
Complete the concept map by selecting the correct responses from number 6.
A. Strike-slip fault B. Normal or reverse fault C. Locked fault
Where are the enzymes which promote the reaction 4H+ + 4e- + O2 ? 2H2O located?
A) in the cytoplasm B) embedded in the inner membrane of the mitochondria C) embedded in the outer membrane of the mitochondria D) embedded in the matrix
What is a critique of the Green Revolution?
A) increased crop production B) began to address poverty in the 1940s C) promoted in Mexico, Argentina, and Brazil D) training excludes women E) all of the above