Biology A - H420

6 sections available · 26 chapters available

Free Biology A - H420 study notes for Cambridge OCR A Level students. Each chapter covers a key topic with examples and practice prompts you can continue inside the thinka app.

Foundations in biology

Exchange and transport

Biodiversity, evolution and disease

  • Communicable diseases, disease prevention and the immune system

  • Biodiversity

  • Classification and evolution

Communication, homeostasis and energy

Genetics, evolution and ecosystems

Development of practical skills in biology

  • Development of practical skills in biology

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