Bacterial cultures are sometimes exposed to ultraviolet (UV) light in order to generate organisms with new genetic traits. Why do microbiologists choose to use UV light for this purpose?
A) UV light makes all cells antibiotic resistant.
B) UV light has the ability to cause changes in DNA.
C) UV light is the usual source of energy for bacteria, thus giving them more energy for evolution.
D) none of the above
Correct Answer:
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