The main principles of evolution are outline below. Using the principles of evolution as a guide, describe how antibacterial resistance happens OR describe how different skin pigmentation evolved in the human population.

1. Variation exists in populations.
2. Some variable traits are inherited or passed along through genetic information.
3. More offspring are born than survive and reproduce.
4. overtime, advantageous traits become more common in a population and disadvantageous traits less common.
5. Advantageous and disadvantageous traits depend on the environment where an organism lives.