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  1. GCSE
  3. Biology OCR
  5. 3.3 Maintaining internal environments

3.3 Maintaining internal environments

Spec J247

Revise OCR GCSE Biology 3.3 Maintaining internal environments with the question bank, lessons, revision guides, and flashcards.

explain the importance of maintaining a constant internal environment in response to internal and external change • allowing metabolic reactions to proceed at appropriate rates

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