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Worksheets1st 9 Weeks environmental sys exam review 25-26
Total questions: 20
Worksheet time: 14mins
What is the primary characteristic of an invasive species?
It is native to the ecosystem
It has natural predators in the new environment
It disrupts the balance of the existing ecosystem
It always improves biodiversity in the new habitat
How can the introduction of an invasive herbivore impact the existing plant population?
It will only eat invasive plant species
It may lead to overgrazing and habitat destruction
It will have no effect on plant populations
It will increase plant diversity in the ecosystem
If bees were to become extinct, which of the following would be the most immediate impact on the ecosystem?
Increased honey production
Reduced pollination of flowering plants
Higher carbon dioxide levels
Overpopulation of bears
What could be a consequence of decreased genetic diversity in a plant population?
Increased resistance to pest infestations
Reduced ability to adapt to their habitat.
Enhanced pollination rates
Greater variety in fruit production
What is most likely to occur if genetic diversity in an ecosystem increases?
Decreased adaptability to environmental changes
Increased vulnerability to diseases
Enhanced ecosystem stability and resilience
Reduced biodiversity within species
Which of the following scenarios would likely lead to increased genetic diversity in an ecosystem?
Habitat fragmentation
Introduction of non-native species
Overexploitation of a single species
Inbreeding within small populations
Which of the following is not part of the Endangered Species Act?
Directions for planning for at risk species’ recovery
Assistance to landowners to help meet economic needs and protect rare species
Criteria for identifying species at risk
Protection for every species that inhabits an area where deforestation occurs
What is the main threat to biodiversity caused by humans?
invasive species
habitat destruction
pollution
overharvesting
How might increased genetic diversity in soil microorganisms affect nutrient cycling in an ecosystem?
It would likely slow down nutrient cycling
It could potentially enhance and diversify nutrient cycling processes
It would have no effect on nutrient cycling
It would only affect nitrogen fixation
Why are invasive species a threat to biodiversity?
They help control native species populations.
They thrive in new territories without natural predators.
They decrease the genetic diversity of native species.
They improve the habitat for native species.
Give one example of an invasive species.
Bald Eagle
Asian Carp
Monarch Butterfly
American Bison
Mullet eat seagrass and algae. Mullet are (a) in an estuary.
ecosystem
community of organisms and their abiotic environment
community
populations of different kinds of organisms that live together in an area
organism
a living being
substrate
surface an organism lives on
succession
series of predictable changes that occur in a community over time
Which is a natural cause of
ecosystem change?
A. Farming
B. Building fences
C. Pollution
D. Hurricane
A small town in the piney woods of East Texas has a soccer field composed of native grasses. The soccer field is mowed once a week.
What effect does continual mowing have on the ecology of the field?
Mowing increases the likelihood of nonnative species displacing native species.
Mowing increases the number of species found in the field.
Mowing causes different types of communities to form across the field.
Mowing maintains a low species diversity by inhibiting further succession.
The maximum amount of organisms an ecosystem can hold
Abiotic
Biotic
Limiting Factor
carrying capacity
A nonliving, physical factor that limits the type of organisms that can exist in a particular ecosystem.
limiting factor
trees
bacteria
viruses
How long were the wolves absent from Yellowstone National Park?
1 year
5 years
10 years
70 years
Match the following
variety of organisms in an ecosystem or
biome
biodiversity
dominant community of plants and
animals that come to live in an area
climax community
the changing sequence of
communities that live in an ecosystem during a given time
period
Ecological succession
In land-based ecosystems, which nutrient (material needed for life) most often limits plant and animal growth?
Nitrogen
Carbon
Phosphorus
Oxygen
