Invasive Species
Biology ⇒ Ecology and Environment
Invasive Species starts at 7 and continues till grade 12.
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See sample questions for grade 12
A lake has been invaded by an aquatic plant that forms dense mats, blocking sunlight and reducing oxygen levels. What is one likely impact on native fish populations?
A shipping company accidentally releases a non-native crab species into a coastal ecosystem. What is one possible ecological consequence?
Describe one example of a biological control agent used against an invasive species and a potential risk associated with its use.
Describe one method used to control invasive plant species.
Describe one way invasive species can affect human health.
Describe the difference between intentional and unintentional introduction of invasive species.
A lake has been invaded by an aquatic plant that forms dense mats, blocking sunlight and reducing oxygen levels. What is one likely impact on native fish populations?
A shipping company accidentally releases a non-native crab species into a coastal ecosystem. What is one possible ecological consequence?
Which of the following is a challenge in eradicating established invasive species? (1) High cost (2) Lack of public awareness (3) Rapid reproduction (4) All of the above
Which of the following is a common pathway for the introduction of invasive species? (1) Ballast water discharge (2) Natural migration (3) Local seed dispersal (4) Seasonal weather changes
Which of the following is a consequence of invasive species on ecosystem services? (1) Improved water purification (2) Disruption of pollination (3) Enhanced soil fertility (4) Increased native fish stocks
Which of the following is a potential economic impact of invasive species? (1) Increased crop yields (2) Reduced tourism revenue (3) Lower pest control costs (4) Enhanced fisheries
Fill in the blank: Invasive species can alter _______ cycles, such as nitrogen or water cycles, in their new environments.
Fill in the blank: The _______ effect occurs when invasive species facilitate the establishment of other non-native species.
Fill in the blank: The _______ hypothesis suggests that disturbed habitats are more susceptible to invasion by non-native species.
Fill in the blank: The _______ hypothesis suggests that ecosystems with high biodiversity are more resistant to invasions.
True or False: All non-native species are considered invasive.
True or False: Biological control always results in the successful eradication of invasive species without negative side effects.
True or False: Invasive species can alter the structure and function of ecosystems.
True or False: Invasive species can contribute to the extinction of native species.
