Introduction Evolution is a process through changes and transformations that happen in living beings over time, giving advancement for new species for our ecosystem. In the 19th century, Darwin helped this evolutionary theory gain strength; he believed that our evolution was based on Natural Selection, and what he explained evolution using genetics facts. He also believed that evolution is descent with modification, or is a change in the genetic composition of a population from generation to generation (Reece et al. 2010). The main idea of biological evolution is that all living being share the same ancestor. Phylogeny is the study of evolution and relationship among the species; and the phylogenetic tree is a graphical representation of …show more content…
In my tree I could find some synapomorphies characteristics, that group some mammals together in my tree.
Character 1-Palatine holes - This is a synapomorphy characteristic that group together the American Opossum, and the Tasmanian tiger.
Character 2- Placental-"Eggs with amnion” and this internalization is a synapomorphy characteristic of all placental in my tree. Group all the mammals, excluding American Opossum, and the Tasmanian tiger.
Character 3- Lack of coronoid process round – This is a synapomorphy characteristic that group the Odocoileus( female and male) and Bos. This character makes them a group.
Character 4- Cavity lateral ; on the skull- This is a synapomorphy characteristic between both Odocoileus(Female and Male).
Character 5- No incisors - This is a synapomorphy characteristic that also group together the order Artiodactyla( White tailed Deer female and male, and the Domestic cow).
Character 6 - Auditory bula - This is a synapomorphy characteristic that group together the order Carnivora(Felis and Canis) and the order Rodentia (Castor and