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  • Unit 3 - Organisms exchange substances with their environment (7402)
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AQA A Level Biology – Organisms exchange substances with their environment Notes / Summary

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These notes cover the topic of biological molecules for AQA A Level Biology, including key concepts, definitions, and exam-relevant content. The document is useful for revision of core topics such as gas exchange in insects and fish, digestion, mass-flow hypothesis, bohr effect, cardiac cycle.

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Unit 3 - Organisms exchange substances with their environment (7402)










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Study Level
A/AS Level
Examinator
AQA
Subject
A Level Biology
Unit
Unit 3 - Organisms exchange substances with their environment (7402)
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Uploaded on
June 25, 2026
File latest updated on
June 26, 2026
Number of pages
27
Written in
2025/2026
Type
SUMMARY

Subjects

  • aqa
  • aqa a level
  • aqa a level
  • biology
  • aqa a level biology
  • aqa a level biology
  • gas exchange
  • digestion
  • mass transport in plants
  • mass transport in animals
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