About ____ of U.S. lakes, rivers, and coastal waters were deemed unsafe for fishing and swimming in 1977.
A. one-tenth
B. one-quarter
C. half
D. two-thirds
E. 90%
Answer: D
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Crustacean zooplankton include the following groups except ________.
A. copepods B. krill C. chaetognaths D. euphausids E. None of these is a crustacean.
What is Darcy's law?
a. A fundamental law in hydrology that defines the groundwater velocity b. A law defining the relationship between porosity and permeability of rocks c. A fundamental law in hydrology that defines energy conservation d. A law calculating permeability of rock given the fluid viscosity and rock property
The Whittaker diagram is a triangular mosaic that shows the average range of ________ and ________ in which each biome occurs
A) altitude and temperature B) altitude and latitude C) precipitation and altitude D) latitude and longitude E) precipitation and temperature
An open access system will lead to ______
Fill in the blank(s) with the appropriate word(s).