A-LevelBiologyCell structureOct/Nov 2020Paper 2 Q69 Marks
Fig. 6.1 shows Vorticella, which is a single-celled organism that lives in freshwater. Vorticella has many cilia which it uses for feeding. [Figure 6.1] The distance shown by X–Y on Fig. 6.1 is 150 μm. Calculate the magnification of Fig. 6.1. State the formula that you will use and show your working. Write your answer to the nearest whole number. formula
📋 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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