Biological hazards are largely a result of
A. pathogens.
B. chemicals
C. natural disasters
D. cultural factors
E. lifestyle
Answer: A
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An individual carbon-oxygen bond is polar. Yet carbon dioxide, CO2, which has two carbon-oxygen bonds, is nonpolar because
A) the molecule has an even number of electrons. B) it has a greater symmetry. C) the electron-pulls of the two oxygen atoms are equal and opposite. D) Two of the above are reasonable.
Which of the following is NOT true of a volcanic dome?
A. Many domes are associated with composite volcanoes and calderas. B. They are one of the largest types of volcanoes. C. Some parts contain volcanic glass, such as obsidian. D. The outer part of the dome contains blocks and other rubble.
In terms of plate tectonics, future oil reservoirs form most easily in areas ________.
A. over hot spots B. along transform faults C. where ocean basins are closing D. along mid oceanic ridges E. of continental rifts
In its pyranose form, naturally occurring D-glucose has five stereocenters. How many possible stereoisomers exist for this structure?
A) 5 B) 10 C) 25 D) 32