Question

9/10
what is the significance of the flu virus changing every year?
it shows that viruses are not affected by evolution.
it exemplifies evolution occurring on a human timescale.
it indicates that vaccines are unnecessary.

Explanation:

The flu virus changing every year shows evolution in action. Viruses evolve, and this change is observable within a human timescale. The first option is incorrect as viruses are affected by evolution. The third option is wrong because vaccines are still necessary to combat the evolving virus.

Answer:

It exemplifies evolution occurring on a human timescale.