Washes, or arroyos, are a type of _____
a. stabilized sand dune
b. playa
c. stream channel with ephemeral flow
d. crescent-shaped sand dune
e. wind-eroded rock
c
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Schooling behavior makes normally small fish appear like a large organism from a distance
Indicate whether the statement is true or false
Roughly one-fourth of anthropogenic carbon dioxide ends up here: ________
Fill in the blank(s) with the appropriate word(s).
Suppose that the concentration of DDT in a lake is 0.0000003 ppm (parts per million) and the concentration of DDT in the tissues of an osprey (a fish-eating bird) is 25 ppm. This is an example of ________
A) biodegradation B) biotruncation C) biomagnification D) bioreduction E) bioremediation
Ozone destruction appears to be related to increasing levels of ________ in the atmosphere.
A. sulfur B. water vapor C. carbon dioxide D. dimethyl sulfide E. chlorine