Edexcel IGCSE Biology Biology Paper 1 November 2020 examiner report (4BI1/1BR)
Examiner report
- Q1 - 8 marks - Cell structure, Enzymes, Eukaryotic and prokaryotic cells
- Q2 - 7 marks - Classification, Food production using micro-organisms
- Q3 - 9 marks - The heart and circulation, Ventilation and the thorax
- Q4 - 13 marks - Abiotic and biotic factors, Energy in ecosystems, Pyramids of number, biomass and energy
- Q5 - 14 marks - Diet and nutrition, Sex determination, The specific immune response, Transport in and out of cells
- Q6 - 11 marks - Air pollution, Respiration
- Q7 - 10 marks - Factors affecting enzyme activity, Food tests
- Q8 - 16 marks - Effects of smoking
- Q9 - 13 marks - Genes and alleles, Monohybrid inheritance, Probability and ratios in genetic crosses, Sex determination, Variation
- Q10 - 9 marks - Increasing crop yield, Water pollution
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