Escherichia coli has the following combination of characters:

  • A
    Rod shaped,$1-3$ $\mu$m long,gram-negative
  • B
    Rod shaped,$1-3$ $\mu$m long,gram-positive
  • C
    Spiral,$1-3$ $\mu$m long,gram-negative
  • D
    Spiral,$1-3$ $\mu$m long,gram-positive

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