Human consumption of which of the following components of seawater helps prevent goiter?
A) Calcium
B) Iodine
C) Magnesium
D) Sodium
E) Sulfate
B
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Which group is most likely to support large-scale funding of hydrogen research?
A. electric utilities B. sustainable developers C. fossil-fuel companies D. automobile manufacturers E. heating and air-conditioning manufacturers
Minimills are more likely than integrated steel mills to select locations because of access to
A) government subsidies. B) unskilled labor. C) markets. D) raw materials. E) fluid capital.
A ________ is a volcano constructed of pyroclastic fragments ejected from a central vent.
A. shield volcano B. dome C. cinder cone D. caldera E. stratovolcano
Zooxanthellae are autotrophic marine protists that are found in the living tissues of some simple marine invertebrates such as corals, sea anemones, and jellyfish. Zooxanthellae are ________
A) bacteria B) golden algae C) dinoflagellates D) protozoans E) foraminifera