Which type of earthquake wave could travel through a vacuum?
a. P-waves
b. S-waves
c. Love waves
d. Rayleigh waves
e. No seismic waves can travel through a vacuum
E
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If bubbles cannot escape easily from a magma, the resulting eruption is likely to
A) be explosive. B) be nonexplosive. C) produce long, thin lava flows.
The "tragedy of the commons" refers to the ____.
A. overuse of privately held resources B. degradation of shared common resources C. human deaths resulting polluted shared resources such as air or water D. government over-regulation of fresh water use E. use of nonrenewable resources
Which of the following statements about nitric oxide, NO, is false?
A) NO contains an unpaired electron. B) NO decreases the ability of the blood to carry oxygen. C) NO is an important signaling molecule in the cardiovascular system. D) None, all of the above are true.
A pheromone is
a. a new form of chemical insecticide awaiting approval by FIFRA b. a strong herbicide c. a species-specific chemical sex attractant d. a bloodstream chemical that controls an organism's growth and development e. a safe, natural pesticide