WorksheetsUnit 9 Practice Test
Total questions: 53
Worksheet time: 2hrs 46mins
Salt water is an abundant resource but unusable for irrigation and drinking. As demands on freshwater sources increase, the use of desalination processes to remove salt from ocean water is increasing. A concern of desalinating water is the large amounts of recovered salts that are returned to the ocean. Which of the following describes the most likely impact of desalination on the surrounding ocean environment?
Nonrenewable resources in the ocean environment would become scarce and upset biodiversity.
Increased levels of salts and minerals in the ocean would result in over-harvesting.
Methane gas would pollute the ocean environment as shoreline organisms begin to die and decay.
Changes in ocean salt levels would cause a decrease of biodiversity
A community is concerned about the water quality of a nearby lake. Increased sedimentation in the lake is endangering the native habitat. The increased sedimentation is most likely caused by which of the following?
construction of homes along the lake
the amount of fish in the lake
the amount of sunlight on the lake
trees planted along the shore of the lake
A strip mining company wants to lease some land that is currently part of a national park. They promise to reclaim the land should any minerals be mined from the area, and they are willing to pay top dollar for the rights. As an ecologist, what factors would you raise with the local government?
the increased traffic in the area
the new jobs that would be created
management of the land after the company leaves
the threat to local biodiversity
The presence of wastes, such as plastic bags and motor oil, in lakes and streams miles away from developed areas suggests that
ecosystems are interconnected and human action can alter ecosystem equilibrium.
recycling programs have failed to conserve biotic resources.
natural processes can alter ecosystem stability.
direct harvesting practices have led to irreversible destruction of ecosystems.
Which of these is one cause of deforestation?
Urbanization
Buying a Christmas tree during the holidays
Overbreeding birds in the wild
Cutting down the tree in your backyard
Which of these are cons of non-renewable resources such as burning of fossil fuels?
harm to the environment
pollution
loss of biodiversity
gain of biodiversity
Salinity refers to
how many plants are in the water
how many organisms live in the water
how much salt in is water
All are freshwater ecosystems except
pond
lakes
estuary
rivers
Aquatic life is abundant, diverse, and full of sunlight at which zone?
photic zone
benthic zone
aphotic zone
What are some factors that determine where an organism lives in an aquatic ecosystem?
Temperature
Rent cost
Sunlight
Clout
Amount of O2
Which zone in this pond would be classified as benthic?
A
B
C
Of the three zones in the pond shown, which would you expect to see little or no photosynthesis, and a greater population of decomposers?
A
B
C
Which zone in the pond would you expect the greatest amount of biological diversity?
A
B
C
This is the most productive ecosystem in the ocean. It is formed as the result of a tiny animal and algae living in a mutualistic relationship.
Mudflat
Sandy shore
Rocky shore
Coral reef
Where would coral reefs be found based on the following needs: photosynthesis and high salinity?
deep ponds
photic zones of lakes
photic zones of oceans
aphotic zone of oceans
aphotic zone of lakes
What are the main differences between rivers and lakes?
Rivers are flowing and have more nutrients than lakes
Rivers are still and have more oxygen than lakes
Rivers are flowing and have less nutrients than lakes
Rivers are still and have less oxygen than lakes
Planktons are protists (animal-like organisms) with lots of variety. Some are phytoplanktons and are able to make their own food through photosynthesis. Which trophic level would phytoplanktons occupy in a food chain with 4 members? Why?
3rd level, they are omnivores
2nd level, they are herbivores
1st level, they are producers
4th level, they are decomposers
This is an American eel. It lives in freshwater. Due to habitat destruction, it was forced to migrate into the ocean. On immediate arrival, the eel will have which problem?
It will swell because it is placed in a low-salinity environment that will act as a hypotonic solution. Some water from outside the eel will move inside, leading to a swollen fish.
It will shrivel because it is placed in a high-salinity environment that will act as a hypertonic solution. Some water from inside the eel will move outside, leading to a shriveled fish.
Natural disturbances, such as fires or hurricanes, can result in
A.parasitism.
B.competition.
C.commensalism.
D.succession.
The end result of ecological succession is usually a(n)
A.land biome.
B.aquatic biome.
C.unstable community.
D.climax community.
Which of the following is not a possible cause of ecological succession?
A. fire
B. flood
C. earthquake
D. change of season
. Which of the following is an example of primary succession?
A.lichens growing on rocks following a volcanic eruption
B.grasses growing after a forest fire
C.oak trees replacing pine trees in a forest
D. non-native species introduced into a climax community
How is primary succession different from secondary succession?
Primary succession starts with soil.
Secondary succession start with bare rock.
Primary succession starts with bare rock, with lichens and moss.
Fire is an example of primary succession.
A volcano in a mountainous, wooded region erupts, spewing tons of ash and destroying the forested area around the volcano. If the volcano remains dormant during
the next 1000 years, what will probably happen?
The area will be repopulated by trees, eventually becoming a
forest again.
The mountains will erode and remain without life.
The area will remain unchanged, covered by volcanic ash.
The area will turn into a completely different habitat, such as
desert of plains.
How has the invasion of pythons effected the everglades ecosystem in terms of species numbers?
The pythons could upset the territorial boundaries of native organisms.
The pythons could adapt to overcome diseases common to native snakes.
The pythons could prey on native organisms and cause native populations to decline.
The pythons could begin to interbreed with native snakes and produce a more successful species.
Which of the following best
describes biodiversity
A. a diverse Biology class
B. variety of all life on earth
C. a variety of plants
D. a variety of animals
Abandoned railroad tracks are overgrown with weeds. Ten years later there are small aspen trees growing in the middle of the tracks. This change is an example of:
Primary succession
Biological evolution
Secondary succession
Heterotrophic nutrition
A factor or factors that can affect species distribution is/are ____.
Predation
Disease
Competition
All of the above
Select all density-independent factors
temperature
fire
flood
disease
Select all density-dependent factors
parasitism
fire
flood
disease
mutualism
