Unit 3: Biodiversity, Conservation and Change

Topic 3.1: Biodiversity Questions

Practice 20 exam-style questions for IB ESS Topic 3.1. Review the question stems below, then unlock the full Question Bank to access markschemes, model answers, and AI grading.

1state1 mark
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State what a higher value of Simpson’s Reciprocal Index (D) indicates about a community.
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2state1 mark
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State what is meant by 'citizen science'.
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3identify1 mark
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Identify one group (other than government) that can help collect biodiversity data.
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4identify2 marks
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Identify two groups, other than scientists, that can contribute to collecting biodiversity data.
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5define2 marks
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Define the term species evenness.
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6define2 marks
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Define the term species richness.
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7state1 mark
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State one reason why good biodiversity data helps conservation planning.
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8identify1 mark
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Identify the level of biodiversity that refers to variation within a species.
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9state1 mark
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State what is meant by biodiversity.
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10define2 marks
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Define the term species diversity.
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11state1 mark
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State one reason why good biodiversity data is important for conservation planning.
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12describe2 marks
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Describe two field methods that could be used to confirm the presence of an elusive mammal species.
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13suggest2 marks
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Suggest one reason why ecosystems with low biodiversity may be more likely to collapse after a disturbance.
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14explain3 marks
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Explain how high biodiversity can increase ecosystem resilience.
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15outline2 marks
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A rare mammal is suspected to live in a forest reserve. Outline two field methods that could be used to confirm its presence.
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16explain4 marks
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Explain how indigenous knowledge can strengthen conservation decisions.
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17calculate3 marks
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A sample contains 9 daisies and 1 sunflower. Calculate Simpson’s Reciprocal Index (D).
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18suggest2 marks
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Suggest two limitations of citizen science data when used to estimate species population size.
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195 marks
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The Sundarbans is the world's largest mangrove forest, located in the delta region of Bangladesh and India. Study the resource booklet figures showing the location, climate data, and biodiversity statistics for the Sundarbans region.
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20state1 mark
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State what is meant by environmental DNA (eDNA) sampling.
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