Natural Selection Case Study

• Natural selection is a process in nature which only the most fit and adapted organisms tend to survive and reproduce, which leads to a change in characteristics over time (Free Dictionary, 2013). Charles Darwin was a marine biologist who set out to search the globe for five years. He carefully observed nature as well as reason; it’s this combination of observation and reason that puts him on the pedestal of the greatest marine biologist (MB News). Darwin noticed a specific change and process in nature and gave it four components: variation, inheritance, high rate of population growth, and differential survival and reproduction (Evolution). These four processes make up natural selection. Without these processes we would not get the three different types of distribution, stabilizing, disruptive, and directional. Each type of distribution correlates to natural selection. For example, case study two, out of our Biological Sciences book is a directional distribution investigation. In this case study, Galapagos finches were measured before and after a drought. The results from this experiment were that the smaller and medium beaked finches died off while larger beaked finches survived. In a graph it is depicted that there were around the same number of finches for all three beak sizes, whereas after the drought the

They are ridged with a segmented exoskeleton that has jointed limbs and they molt as they grow. These roly-poly bugs are in a species of more the 3,000 and most live on land. They prefer habitats that are dark and damp because they breathe through gills i.e., under rocks and logs (Jordan and North, 2014). By varying in speed and color, roly-poly bugs are easily hidden in their dark and damp habitats, but only the quickest and darkest survive. These bugs are prey to birds, lizards, spiders and frogs; if you are the weak link in your population you will be