Answer ( 1 )

  1. Escherichia coli (E. coli) bacteria are typically about 1-2 micrometers in length and 0.5-1 micrometer in diameter. To give you a comparison, if you were to line up about 500 to 1000 E. coli bacteria end to end, they would stretch across the width of a single human hair. So, they’re quite tiny!

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