A-LevelBiologyBiodiversity and conservationOct/Nov 2025Paper 4 Q611 Marks
The distribution of the large blue butterfly, Phengaris arion, extends across Europe and Asia. It is assessed by the International Union for Conservation of Nature (IUCN) on the Red List™™ as 'Near Threatened' globally and 'Endangered' in Europe. In Europe, P. arion became extinct in the Netherlands in 1964 and in the United Kingdom in 1979. [Figure 6.1] lists the conservation status categories in the IUCN Red List™™. [Figure 6.2] shows P. arion. (a)(i) Explain how IUCN Red List™™ assessments help to conserve biodiversity.
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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