What defines an invasive species?
A species introduced into a new ecosystem that becomes extinct
A native species that declines in population
A non-native species that spreads and causes ecological or economic harm
A genetically modified organism released for agriculture
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Why are invasive species often so successful in new environments?
They often face few natural predators or controls
They evolve to blend in genetically
They rely on mutualism with native species
They form hybrid species with native organisms
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Which of the following is an example of an invasive species in North America?
Gray wolf
American bison
Burmese python
Monarch butterfly
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What is one economic impact of invasive species?
Reduced need for pesticides
Increased agricultural yield
Costly damage to crops, forests, or fisheries
Increased soil fertility
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Which of the following human behaviors increases the spread of invasive species?
Building wildlife corridors
Removing ballast water before shipping
Preserving native plants in gardens
Releasing pets into the wild
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Which of the following characteristics is typical of successful invasive species?
Slow reproduction and limited dispersal
High reproductive rate and broad tolerance for conditions
Dependence on specific food sources
Strict seasonal breeding cycles
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What is one way to prevent the spread of invasive species?
Introduce predators from the invasive species’ native range
Import exotic species for garden use
Clean hiking boots, boats, and gear before moving between ecosystems
Eliminate all non-native plants
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Which of the following best defines an invasive species?
A species that naturally evolves to adapt to different habitats over time.
A species that is introduced to a new environment, where it establishes, spreads, and causes harm to native species, ecosystems, or human activities.
A species that migrates seasonally in response to environmental changes.
A species that exists only in a single, isolated geographic region and does not spread elsewhere.
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Which of the following species is least likely to be classified as invasive?
European green crab, which was introduced to North America and has disrupted native shellfish populations.
Water hyacinth, an aquatic plant that spreads rapidly in non-native regions, choking waterways and depleting oxygen levels.
American bison, which once roamed North America in large herds and has been the focus of reintroduction efforts.
Cane toads, which were introduced to Australia to control pests but have instead poisoned native predators and disrupted ecosystems.
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Which of the following is not a commonly used method for controlling invasive species?
Biological control, where natural predators, parasites, or diseases are introduced to reduce invasive populations.
Chemical control, which involves using pesticides, herbicides, or other chemicals to manage invasive species.
Habitat destruction, where entire ecosystems are removed to eliminate invasive populations.
Mechanical control, which includes physically removing invasive species through trapping, hunting, or manual removal.
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