After the explosion of the Deepwater Horizon oil-drilling platform in 2010, Scientists estimate that about ________ of the oil either was naturally dispersed in the water as small droplets or was chemically dispersed
A) 10%
B) 25%
C) 40%
D) 75%
E) 90%
B
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Which of the following best matches the description?Upper layer of the ocean where the sun's rays penetrate.
A. marsh B. pelagic C. boreal forest D. phytoplankton E. periphyton F. deciduous forest G. euphotic zone H. grassland I. desert J. pioneer community K. littoral zone L. biochemical oxygen demand M. savanna N. tundra O. benthic
The ________ of a metal is a measure of its concentration necessary for profitable mining
Fill in the blank(s) with correct word
How do the rates of land use and gasoline consumption in Australian cities compare with those in U.S. cities?
A) At any level of per capita land consumption, people in U.S. cities use more gasoline than those in Australian cities. B) The rates of land use and gasoline consumption in U.S. cities are similar to those in Australian cities. C) At any level of per capita land consumption, people in U.S. cities use less gasoline than those in Australian cities. D) The answer cannot be determined from the graph.
Which of the following are primary messengers?
A) prostaglandins B) steroid hormones C) thromboxanes D) all of these