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  1. GCSE
  3. Biology OCR
  5. 4.1 Ecosystems

4.1 Ecosystems

Spec J247

Revise OCR GCSE Biology 4.1 Ecosystems with the question bank, lessons, revision guides, and flashcards.

recall that many different materials cycle through the abiotic and biotic components of an ecosystem • examples of cycled materials e.g. nitrogen and carbon

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