Cambridge International IGCSE Biology (0610) · CAIE 0610
20 Human influences on ecosystems
Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).
Practice questions on Human influences on ecosystems
- Non-biodegradable plastic is a major source of pollution in both land and water habitats. … (4 marks, Explain)
- Describe the process of eutrophication, including how it leads to a reduction in the biodi… (4 marks, Describe)
- Explain how marine pollution caused by an oil spill can lead to a reduction in biodiversit… (4 marks, Explain)
- Explain how increasing urbanisation can lead to flooding in an area that was previously fo… (4 marks, Explain)
- Explain why intensive livestock farming is considered unsustainable and damaging to the en… (4 marks, Explain)
- Selective breeding and chemical fertilisers are two methods used to increase food supply. … (4 marks, Describe)
- Monoculture is widely used in modern agriculture. Explain why farmers choose to grow crops… (4 marks, Explain)
- Intensive farming methods are used to increase food production. Explain how intensive live… (4 marks, Explain)
- Explain why a reduction in the gene pool makes an endangered species more vulnerable, and … (4 marks, Explain and Describe)
- Describe how the use of insecticides, herbicides, chemical fertilisers and selective breed… (4 marks, Describe)
- Describe four harmful effects of deforestation on the environment. (4 marks, Describe)
- Explain how the extraction of natural resources from a forest can lead to a reduction in b… (4 marks, Explain)
- Explain how the clearing of forest land to make space for monoculture farming can lead to … (4 marks, Explain)
- Untreated sewage is sometimes discharged into rivers. Explain how the discharge of untreat… (4 marks, Explain)
- Insecticides used in farming can enter nearby rivers and accumulate in the bodies of organ… (4 marks, Explain)
- Acid rain is a form of air pollution caused by the release of sulfur dioxide from the burn… (4 marks, Explain)
- Explain why legal quotas are used as a conservation measure for commercial fishing, and de… (4 marks, Explain)
- Describe how captive breeding programmes and seed banks are used to conserve endangered sp… (4 marks, Describe)
- Explain why deforestation can lead to the extinction of species, and suggest two conservat… (4 marks, Explain)
- Explain why monitoring endangered animals is important for their conservation, and describ… (4 marks, Explain)
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