Endocrine disruptors cause the following impacts to organisms

• increased respiratory rate

• damage to the cardiovascular system

• increased size of individual organisms

• birth defects and cancer

DDT is a POP (Persistent Organic Pesticide) that can act as an endocrine disruptor.  Which would it have the greatest effect on?

• Producers
• Primary Consumers
• Secondary Consumers
• Autotrophs

The release of a large amount of sewage overflow into a nearby creek would lead to: DO = dissolved oxygen , BOD = bacterial organic decomposition

• High DO, High BOD, Low Fecal Coliform

• Low DO, High BOD, Low Fecal Coliform

• Low DO, High BOD, High Fecal Coliform

• Low DO, Low BOD, High Fecal Coliform

In a river ecosystem, dissolved oxygen concentrations drop quickly downstream from a point-source input of organic matter into the river due to

• increasing populations of mayfly and stonefly larvae
• increasing bacterial activity as organic matter decays
• decreasing bacterial activity as turbidity increases
• decreasing water temperature

Aquatic ecosystem that serves as a nursery for many species and suffers from pollution from city harbors like the Chesapeake Bay

• estuaries

• coral reefs

• open ocean

• wetlands

Presence of fecal coliform bacteria suggests that

• a factory polluted the river

• a nearby treatment plant added chlorine to the waste water

• the water is safe for drinking

• untreated animal waste contaminated the water

Which of the following describe the relationship between D.O. and B.O.D.?

• When D.O. decreases, the B.O.D. decreases

• When D.O. decreases, the B.O.D. increases

• When B.O.D. decreases, the D.O. decreases

• When B.O.D. increases, the D.O. decreases

Which water quality test will best determine the disruption of photosynthesis caused by cloudy water conditions from sedimentation?

• Temperature

• Salinity

• Dissolved oxygen

• pH

• Turbidity

Which of the following is a point-source pollutant?

• Sediment loading from erosion

• Runoff of pesticides from croplands

• Animal wastes from feedlots

• Fertilizer runoff from urban areas

• A sewage treatment plant effluent pipe

Which of the following river conditions would yield the highest dissolved oxygen content?

• Fast-moving cold water, large amounts of submerged vegetative biomass

• Stagnant, warm water with large clumps of algae

• Slow- moving warm waters, low amounts of submerged vegetative biomass

• Warm water with little vegetative biomass