Termites are unable to digest some plant materials (fiber). Termite stomachs contain bacteria that digest the fiber in wood for the termites. In turn, the bacteria are provided with a hospitable environment to carry out their life processes.

The bacteria help termites by digesting wood fiber that termites cannot digest themselves. The termites, in turn, provide the bacteria with a hospitable environment. Because both organisms benefit, this relationship is mutualism.

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