A-LevelBiologySelection and evolutionMay/June 2020Paper 4 Q312 Marks
Cats are members of the Felidae family. Two genera of Felidae are Leopardus and Panthera. (a) The genus Leopardus consists of species of wild cats that are small and spotted. In 2013, biologists investigated the evolution of Leopardus tigrinus in South America. Fig. 3.1 shows the locations in South America of two populations of. L. tigrinus, population A and population B. [Figure 3.1] • Population A lives in grassland and desert habitats and population B lives in forest habitats. • The cats in population A have a lighter coat colour and a different pattern of spots from the cats in population B. • Genetic analysis shows that population A is genetically distinct from population B. • Population B has now been reclassified as a new species, L. guttulus.
📋 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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