Question

Bacteria exposed to UV light have a higher rate of mutation than those that have not been exposed. Researchers claim that these mutations cause genetic variations among the bacteria.
Is this conclusion supported by the evidence?

• No, because a higher rate of mutation does not translate to genetic variations.
• Yes, but only if the mutations do not affect bacteria's survival.
• No because UV light only affects cellular functions, not genetic structures.
• Yes, because UV light is a known mutagen that can alter DNA.

Answer 1

Yes, because UV light is a known mutagen that can alter DNA.

Mutations change DNA sequence, so a higher mutation rate produces more genetic variants in the population. Whether mutations are beneficial, neutral, or harmful to survival doesn't change that they are genetic changes.