A-LevelBiologyBiodiversity and conservationMay/June 2020Paper 4 Q88 Marks
(a) Sampling is used to find out the variety of species in an ecosystem and the size of the population of each species. A study was carried out to investigate the biodiversity of two fields, A and B. Field A had not been used for growing crops for 10 years. Field B had been used for growing crops until one year before the study. Random sampling was carried out.
📋 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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