The source of variation among microorganisms that were once identical is
A)antibiotic resistance.
B)virulence factors.
C)sigma factors.
D)mutation.

Question

Quizplus · Accepted Answer

The source of variation among microorganisms that were once identical is mutation. Mutations, which are changes in the DNA sequence, can lead to changes in the phenotype and can result in new traits that may confer a selective advantage, like antibiotic resistance or increased virulence. Virulence factors and sigma factors may be affected by mutations but are not the source of variation.

The Source of Variation Among Microorganisms That Were Once Identical