One of the main roles of plants in biogeochemical cycles is to
A. harden the soils.
B. decrease the amount of time that water remains in contact with rocks and soils.
C. extract carbon dioxide from the atmosphere.
D. reduce the rate of weathering.
Answer: C
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During the Mesozoic, the east coast of North America became a passive margin. Indicate whether the statement is true or false
Climate
A) is a summary of weather conditions for a particular area. B) delineates extended periods of atmospheric history. C) provides normal conditions, i.e., what is expected. D) all of these
Which section of the United States is most likely to experience a persistent subsidence inversion during the summer?
a. Pacific Coastal regions b. Central Plains c. Southern Florida d. Atlantic Coastal regions e. Midwest
In an ecosystem, throughput can refer to
A. energy that originates in the system and flows out. B. the equilibrium state. C. matter that flows into the system but not out. D. something that can expand the size of state variables.