On Thursday, a guest speaker, Dr. Louise S. Mead of the National Center for Science Education, came to our biology class to explain to us about evolution. When people first hear the word "evolution" they would think about "survival of the fittest", but Dr. Louise explained that evolution isn't necessarily about "survival of the fittest'. Evolution is the change in species over time. A fact she told us about evolution was that Darwin was the first man to explain evolution with evidence and detailed information. She also talked about the five main processes of evolution, which were natural selection, genetic drift, evo-devo, and mutation. A power point presentation was shown to help us understand more about the five types of evidence for evolution. The five evidence are:
-biogeography: distributions of fossils around the world and how they got there.
-comparative anatomy: distribution of similar characteristics in the great diversity of species.
-molecular biology: study of how the number of human chromosomes and DNA differ from other species.
-fossil record: how vertebrates came to live on land.
-developmental biology: comparison of the genes.
I think this presentation helped me to better understand about the process of evolution.
