Biogeography

Every specie in the earth is came from an ancestor. Their ancestor change over time to adapt to the environment, this theory knew as evolution. Scientist called it a theory not because it just a belief that can’t be prove, but they already found many piece of evidence to prove that this theory is actually true. The three trustworthy evidence for this theory is fossil evidence, homologies, and biogeography. Fossil evidence are the evidence that found in the fossil of a species. Scientist determine the age based on the level of the dust that they found the fossil, and how the structure closely relative to each other. Homologies is a study about a body part, its structure and function. Different species related to each other by the structure of their bones and how a body part work. This study also including the embryology which is the study about an unborn organism, how it start off with and change over the time. Lastly, biogeography is about how the environment impact an organism and how that organism change to adapt to the changing of the environment. …show more content…
ardipithecus boisei is 18.5, homo erectus is 35.71, homo habilis is 33.6, homo heidelbergensis is 26.1, homo neanderthalensis is 25.5, homo sapiens is 36.77, and sahelanthropus tchadensis is 18.5. The fact is if the opisthion index is less than 15, then that organism walks with two feet. We can conclude that all the organisms are bipedalism because none of the opisthion index is less than 15. The evolution might had happen because the ecosystem appear many more animals that can harm human ancestor, so maybe they tend to scavenging plant, fruit and hunt animal that is not too dangerous like pigs, cows, etc. Time passed, human ancestors became smarter to survive, they learned how to plant, raising animals, and made clothes to keep them