apes test study

This stage uses microorganisms to breakdown nitrogen wastes

B

Based on the diagram, which of the following is an expected consequence of runoff and sewage in an aquatic environment?

Decreased oxygen levels in surface water as a result of a decrease in photosynthetic rates by algae

Which is an example of a point source of water pollution?

Effluent from a wastewater treatment plant

Which is the correct order of the events leading to cultural eutrophication?

Leaching of nutrients from fertilized agricultural lands, algal bloom, fish die-off

Which of the following lists the steps in the correct sequence?

P-Q-R-S

What is a watershed?

area of land that drains to a body of water

A manure lagoon is being built for a farm that has 500 cows. Each animal produces 50 L of manure every day. How large must the lagoon be to hold 30 days' worth of manure?

750,000 L

Which of the following is most likely to result from destruction of wetlands surrounding a river?

An increased frequency of flooding of the river valley

Which of the following methods of agricultural irrigation results in the loss of the least amount of water by evaporation?

Drip-irrigation

Which of the following characteristically produces non-point-source pollution?

Erosion from agricultural land

Which of the following is the best example of a tragedy of the commons?

Eutrophication of a pond on farmer's land

The use of nitrogen-based fertilizers in the Midwestern United States is a major contributing factor to which of the following?

Hypoxia in the gulf of Mexico

Scientists are interested in measuring the effect of pollution on the water quality of a stream. They will use observations of various bottom-dwelling insects, or macro invertebrates, collected in the streams indicators of the physical, chemical, and biological conditions within the stream. Which of the following best describes why macro invertebrate can be used to assess the overall health of a stream?

Macro Invertebrates live in an aquatic ecosystem for a long enough time to show the chronic effects of pollutants, and many tend to remain in the same area throughout their life span.

Which of the following is a point source pollutant that would likely affect the ecosystem health of a coral reef?

Oil released from the broken hull of a shipwrecked tanker

Which of the following practices would best help to protect against inland and coastal flooding in urban areas?

Preserving wetland and coastal mangrove habitats

Which of the following strategies will best reduce eutrophication in the Chesapeake bay?

Regulating the use of inorganic fertilizer in the Susquehanna River watershed

Why did the DO after one week decrease as the amount of waste increased?

The algae could not consume the waste fast enough

Which of the following could this released water have on the reservoir?

The temperature of the released water causes a decrease in the amount of dissolved oxygen in the reservoir.

Which of the following is true of sewage treatment plants in the US?

They are not designed to remove pharmaceutical chemicals from wastewater

Which of the following is an effective alternative to chlorine for disinfecting wastewater in a municipal treatment plant?

UV

You and your family have planned a weekend retreat at a lakeside campground. Upon arrival, you notice a Department of Health sign indicating the presence of fecal coliform bacteria in the lake. As an environmental science student you know to..

Warn your family that fecal coliform bacteria is an indicator of harmful microorganisms in the water

Which is NOT a characteristic of a dead zone?

low nitrogen concentrations

At which of the following locations in the stream was there most likely a discharge of excess organic matter in the water?

C

The above graph shows the effect of sewage on BOD and DO in a flowing stream. The smallest fish populations will most probably be found at point

C