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A change can spread through a web - Paper 1

Read the information, then answer the questions. An adult may read the instructions aloud. Show your working where asked.

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Supplied simplified food web: seeds -> mouse -> owl; grass -> vole -> owl. Every arrow points FROM food TO consumer; it represents a route for matter and energy transfer. Proposed change: owl numbers fall. Predict an initial effect with other relevant conditions similar, then state a reason not to treat it as certain.

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