+Bacteria are ancient, single-celled [Life](/wiki/life) forms, ubiquitous on Earth. These tiny [Cell](/wiki/cell) structures play critical roles in ecosystems, from nutrient cycling to impacting health, often unseen yet profoundly powerful.
+## See also
+- [Microbe](/wiki/microbe)
+- [Virus](/wiki/virus)
+- [DNA](/wiki/dna)
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