What is the second most valuable marine resource?
A) Gravel
B) Oil
C) Gas
D) Salt
A
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Volcanic bombs have a twisted, streamlined shape, which indicates that they ____
A)cooled quickly underwater B)were formed from ropy, viscous mafic flows C)were erupted as globs of magma that cooled and solidified during their flight through the air D)have high amounts of dissolved gases and low amounts of sodium E)were erupted gently from a shield volcano and cooled as they moved downslope
What mineral is characterized by a reddish streak, as shown in this photograph?
A. calcite B. quartz C. magnetite D. hematite E. feldspar
Which of the following allows cetaceans to remain submerged for extended periods of time?
A) Some have less red blood cells per unit of blood volume as terrestrial animals. B) They are faster breathers than terrestrial animals. C) They can extract almost 90% of the oxygen in each breath. D) They have a smaller blood volume per unit of body mass. E) They have less myoglobin in their muscle tissue as terrestrial animals.
Pest resurgence is part of the problem of pesticide resistance and happens when a pest organism
A. Adapts to the pesticide and produces even more pesticide-tolerant offspring B. That was dormant during pesticide application becomes active and produces offspring C. Receives a gene for pesticide tolerance through a virus infection D. Adapts to the pesticide and produces tolerant offspring E. That is tolerant to the pesticide survives and produces tolerant offspring