Cancer cells can evolve and adapt to their environment in a way that is similar to how species evolve. One way that cancer cells can evolve is through the process of natural selection. Just as species with beneficial traits are more likely to survive and reproduce, cancer cells with advantageous genetic mutations are more likely to survive and multiply within the body.
For example, consider a population of normal cells that becomes transformed into cancer cells through a genetic mutation. If this mutation confers a survival advantage to the cancer cells, such as the ability to evade the immune system or to resist chemotherapy, then these cancer cells will be more likely to survive and proliferate. Over time, the population of cancer cells may continue to evolve through additional genetic mutations that further enhance their survival and growth. This process of evolution through natural selection can result in the emergence of cancer cells that are more aggressive and difficult to treat.