Which of these is responsible for most of your per capita water footprint?
A. virtual water
B. showering
C. brushing your teeth
D. washing car
Answer: A
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What type of eruption formed the volcano in this photograph?
A. fluid lava flows B. eruptions beneath the seafloor C. lava fountains D. fissure eruptions E. viscous lava and pyroclastic eruptions
The DMZ crosses the _______°N parallel of latitude
A) 23 B) 38 C) 49 D) 66
The structure of interleukin-2 includes which of the following?
A) four helical segments B) only b-pleated sheet C) both a-helix and b-pleated sheet D) four cysteine residues which form two disulfide bridges
A "dynamic low" is produced by ________
A) very warm surface conditions B) very cold surface conditions C) the strong rise of air D) the strong descent of air E) many kilometers of smooth Earth surface