Oxford AQA IGCSE · CORE Biology (9221)

The effect of human interaction on ecosystems and biodiversity: Practice Questions

4 multiple-choice questions marked as you go, and 3 written questions with worked solutions. All on The effect of human interaction on ecosystems and biodiversity.

7 questions20 marksFree, no account

Question 1

1 mark

Large-scale deforestation in tropical areas is a major concern for ecologists. What is the primary biological consequence of this activity according to the syllabus?

Question 2

1 mark

Which statement best explains why large-scale deforestation in tropical areas leads to a significant reduction in biodiversity?

Question 3

1 mark

In a lake ecosystem, an excess of nitrate ions from fertilisers leads to a rapid growth of algae on the surface. How does this specifically lead to the death of fish in the lake?

Question 4

1 mark

Large-scale deforestation in tropical regions has several significant environmental impacts. Which of the following is a direct consequence of deforestation according to the syllabus?

Question 5

5 marks

Large-scale deforestation in tropical regions is a significant human interaction with ecosystems. Explain exactly how this process leads to a reduction in biodiversity and name one specific impact it has on the Earth's atmosphere.

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Question 6

6 marks

Explain how eutrophication, caused by the run-off of fertilisers into a lake, leads to the death of aerobic organisms such as fish.

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Question 7

5 marks

Explain why global warming, attributed to increasing levels of carbon dioxide and methane in the atmosphere, may lead to the extinction of certain species, referring to changes in migration and geographical distribution.

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