Cumulative Exam — Cumulative exam Answers

While an important source of freshwater, groundwater is not as widely used as rivers and springs.

Which of the following best explains why marine debris is not caused solely by countries bordering the ocean?

Which of the following would be expected to have the greatest impact on primary productivity?

In which region would you find the lowest concentration of public land in the United States?

What characteristic sets streams and rivers apart?

The introduction of Caulerpa, also known as killer algae, into California was ultimately the result of _______.

Which of the following most significantly determines a community's access to potable water?

There is little variety among organisms found in pools, ponds, and lakes.

Desalination has no known negative impacts on the environment.

Zoning laws establish _______.

Biological pest control methods supplement but cannot replace chemical pest control methods.

Energy in most ecosystems must flow through autotrophs because ______.

Why does fossil fuel use in the United States make the U.S. vulnerable to the political wishes of foreign countries?

Photosynthesis and carbon fixation can only occur in the presence of light.

How does the use of hydroelectric energy compare to the use of coal?

The percentage of a hunter-gatherer society’s diet provided by hunting versus gathering was mostly determined by _______.

Which of the following is a benefit associated with the use of energy producing technologies excluding the burning of fossil fuels?

Rivers and streams are biodiverse ecosystems that are sensitive to change.

The largest supply of Earth’s freshwater is stored in _______.

Which of the following is a possible cost of using renewable resources?