Topic 3
Organisms exchange substances with their environment
Surface area to volume ratio, gas exchange, digestion and absorption, mass transport in animals and plants.
Areas covered
- Surface area to volume ratio
- Gas exchange
- Digestion
- Absorption
- Mass transport in animals
- Plants
Resources in this topic
- 5 sections of concise revision notes
- 71 flip flashcards
- 21 exam-style questions (75 marks) with AQA-style mark schemes
- A timed practice test with self-marking
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