Edexcel IGCSE Biology Biology Paper 1 June 2025 examiner report (4BI1/1BR)
Examiner report
- Q1 - 8 marks - Classification, Sexual and asexual reproduction
- Q2 - 10 marks - Cell structure, Effects of smoking, Ventilation and the thorax
- Q3 - 9 marks - Cell structure, Eukaryotic and prokaryotic cells, Respiration
- Q4 - 11 marks - Diet and nutrition, Digestion
- Q5 - 12 marks - The human reproductive system, The menstrual cycle
- Q6 - 14 marks - Osmosis, Rate of diffusion
- Q7 - 14 marks - Ecosystems, Energy in ecosystems, Sampling and fieldwork, The greenhouse effect and climate change
- Q8 - 14 marks - Genetic engineering, Increasing crop yield
- Q9 - 12 marks - Monohybrid inheritance, Natural selection, Probability and ratios in genetic crosses, Sex determination
- Q10 - 6 marks - Homeostasis
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