The growth of human population worldwide over the past 1,000 years has been ________.
A. on a straight linear increase with time
B. exponential, with a generally increasing growth rate
C. logarithmic
D. essentially zero
E. exponential, with a constant growth rate
Answer: B
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What are the relative compositions of the materials from which stars form?
A. about 2% hydrogen, about 74% helium, no more than 24% other materials B. about 74% hydrogen, about 24% helium, no more than 2% other materials C. about 24% hydrogen, about 74% helium, no more than 2% other materials D. Stars have vastly differing combinations of materials.
Which worm has a segmented body plan?
A) Platyhelminthes B) Nematodes C) Roundworms D) Polychaetes
Glacial meltwater streams typically:
a. deposit till. b. are meandering. c. carry silts and clays. d. deposit outwash. e. carve horns.
The Montreal Protocol ________
A) developed the framework for reduction of carbon dioxide in the United States and Canada B) developed the international treaty for eliminating sulfur emissions from nuclear power plants C) addressed transnational movement of acid-forming pollutants D) is an example of a failed attempt to reduce international air pollution E) resulted in significant reduction in the production of CFCs by signatory nations