What term is used to describe the exclusive microecosystem picoplankton have been discovered to operate in?
a. "picoplankton economy"
b. "microecosystem economy"
c. "phytoplankton economy"
d. "official economy"
e. "black market economy"
e
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The Spanish flu outbreak that lasted from January 1918 to December 1920 spread around the world, even to the Arctic and remote Pacific islands. During the outbreak, between 50 and 130 million people died making it one of the deadliest natural disasters in human history. Which best describes this outbreak?
A. a pandemic B. an epidemic C. a transgenic disaster D. a remission
A Doppler effect occurs when a source of sound moves
A. away from you. B. toward you. C. either of these D. none of the above
Lead pollution is a problem because lead ________
A) causes central nervous system damage in humans B) will cause the ozone hole to increase C) forms an acid in the atmosphere, resulting in acid precipitation D) is a precious metal, and it is being lost to the atmosphere
Which of the following is NOT a major factor in producing a great variety of local climates?
a. underlying strata b. precipitation c. temperature d. latitude e. elevation