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Animal interactions can also be shown as graphs. Study each graph below. Decide which type of interaction is displayed in the graph.

Graph 1

Graph showing number of organisms when the two organisms live together and separately. In this graph when they live together both increase in numbers.

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Mutualism

Graph 2

Graph showing number of organisms when the two organisms live together and separately. In this graph when they live together organism one increase and organisms 2 decreases.

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Parasitism

Graph 3

Graph showing number of organisms when the two organisms live together and separately. In this graph when they live together organism one stays the same and organisms 2 increases.

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Commensalism

Graph 4

Graph showing number of organisms when the two organisms live together. In this graph when one organism population goes up the second organisms also goes in up the next month.

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Predation