Really Smart



Evolution is the process of change that occurs over time in living organisms. It is the process by which all forms of life have developed from primitive organisms to more complex forms over billions of years. Evolution occurs due to natural selection, which is the process by which individuals with advantageous traits are more likely to survive and reproduce in a given environment than those without. An example of evolution is the development of the eye. Over time, an eye-like structure developed in many species of animals. This structure allowed them to better sense their environment, and to respond more quickly to potential threats and opportunities. Eventually, the eye became more complex and allowed for better vision, which gave these animals a selective advantage. Evolution can also refer to the genetic changes that occur over time in a species. As organisms interact with their environment, certain genetic traits may become more or less common in the population. For example, the gene for sickle cell anemia is more common in people living in areas with malaria, because it provides them with some protection from the disease. Fun fact: one of the most famous examples of evolution is the phenomenon of antibiotic resistance. Over time, bacteria have developed mechanisms to resist antibiotics, making them more difficult to treat.