Bedbug Biology
1. Bedbugs have been evolving in the United States since the 1940s and 50s. (1) Due to genetic mutations after World War II a widespread of pesticides known to be DDT was used. The genetic variation makes them resistant to the pesticides. (2) These DDT pesticides were used on the bedbug population, making them resistant to the pesticide. This illustrates natural selection because those resistant with the pesticide survive best. Which is heritable to their population with the resistant pesticide offspring. This give their offspring the best fitness for adaptation to survive and breed resistant pesticide to their offspring as well. (1)
2. Over the years our brains have shrunk from our ancestors, which had a much larger variation than most human’s
2. Over the years our brains have shrunk from our ancestors, which had a much larger variation than most human’s