Bacteria are single-celled prokaryotic organisms that can be beneficial or harmful to the organisms. Bacteria and mammals share a mutualistic relationship.
Mutualism is the ecological interaction between two species that is positive and benefits the two species mutually. The two organisms in the relationship work together.
In the case of bacteria, they live in the intestine of the mammals and get benefit by getting nutrients and protection, on the other hand, the mammals get benefitted as their food gets broken and digestion gets completed.
Therefore, bacteria and organisms share a mutualistic relationship.
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