Summary

• Description:

  The PDF document comprises KCSE 2025 Biology Paper 1 Past Paper with Marking Scheme. The marking scheme is in a different document.

  It was a KCSE Biology Paper 1 examination.

  • Number of Questions: 22

  It covers the following topics:

  • Characteristics of living organisms (irritability and sensitivity)
  • Gaseous exchange and breathing mechanisms
  • Cell biology and specific organelles (chloroplasts)
  • Classification of plants and animals
  • Mammalian tissues and their functions
  • Human reproduction and embryonic development
  • Dental health and the effects of sugary foods
  • Ecology, food webs, and trophic levels
  • Respiratory diseases and their causative agents
  • Cell division (mitosis versus meiosis)
  • Symbiotic relationships in plant roots
  • Plant reproduction, floral structures, and pollination
  • Plant morphology (dicotyledonous vs. monocotyledonous leaves)
  • Evidence of organic evolution (comparative embryology)
  • Energy flow and ecological pyramids in aquatic ecosystems
  • Plant physiology (seed germination and respiration)
  • Human circulatory system, blood groups, and transfusions
  • Physiological processes (osmosis and active transport)
  • Support and movement (anatomy and function of mammalian vertebrae)
• Category:

  KCSE Past Papers
• Level:

  Form 4
• Subject:

  BIOLOGY

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