SGM/ Exam Review

Which of the following rivers is not part of the Chesapeake Bay watershed?

• James

• Roanoke

• York

• Rappahannock

Which of the following states is not part of the Chesapeake Bay watershed?

• North Carolina

• Pennsylvania

• Maryland

• New York

Which of the following is not an abiotic test to measure the quality of water?

• pH

• plant biomass

• dissolved oxygen

• turbidity

Of the following examples, which one would you identify as non-point source pollution?

• smoke from a smokestack

• nutrient run off from farm fields

• water from a sewage plant pipe

• oil leak from an oil tanker

Which of the following organisms would most likely be affected by the biomagnification of the pesticide DDT?

• phytoplankton

• herring

• zooplankton

• bald eagle

A group of students on a field trip to the Chesapeake Bay encounters an unusually large bloom of algae. The students determine that the most likely cause of this bloom is:

• an overabundance of nitrogen and phosphorous

• an increase in surface temperature

• an increase in surface light

• a decrease in plankitovoires

An ecologist finds a marshy area on a plot of land not far from a stream. In his notes, he indicates the marsh is an ecotone. This distinction means:

• the marsh is in the middle of the surveyed plot with no connection to adjacent surface waters

• the marsh is mostly dry in its composition

• the marsh is a transition area between terrestrial and aquatic habitat

• the marsh supports a great amount of diversity

An Estuary is a highly productive system that mixes nutrients, dissolved oxygen, and stimulates producer growth as well as providing a transition area between upland and open water habitat. Which of the following is considered an estuary?

• James River

• Lake Anna

• Chesapeake Bay

• Atlantic Ocean

You are a conservation biologist and have been assigned the task of conserving an endangered species. Based on your knowledge, which of the following steps would be your first priority in protecting the species?

• breed individuals in captivation

• reduce pollution in the area

• conserve the species’ habitat

• introduce a species to eat the predators of the endangered species

The Potomac River has been in the news because of an infestation of the Northern Snakehead Fish. The fish is of concern because of possible interruption in native species habitat and distribution. The Snakehead is an example of:

• endangered species

• exotic/invasive species

• species of special concern

• threatened species