S: Evidence of Evolution
FC: Evidence of Evolution | By: Kara Baka
1: Dedicated to Charles Darwin
2: Darwin's | Tree Of Life
3: The "Tree of Life"has many branches of species. We, as humans, are the last living species on our branch. | Darwin studied many animals and noticed that they are all related to each other, but still different. He made a drawling of the tree of life and shows how we are all related.
4: Homologous | Homologous Structures are when different animals have the same bone structures, but are used for different things. This is caused by divergent evolution.
5: Structures | This cladogram shows the relation between the different animals through their bone structures. For example, the amphibians and the primates are related, they share the same bone structures of having four limbs.
6: Vestigial Structures | Vestigial structures are remnants of functional structures, which can be compared to fossils and provide evidence for evolution. These structures serve no purpose in the modern animal they are just leftover body parts that do not help a species.
7: The ostriches are one of the few types of birds that cannot fly. | Penguins have bird like wings, but are not used for flying, but for swimming. | Whales have a pelvic bone, but have no legs, so there is no need to have one.
8: Comparative Embryology | Comparative Embryology is the branch of embryology that compares and contrasts embryos of different species.
9: Comparative Embryology is comparing traits between species through homologous structures that are not present in the adult organisms, but do appear in some stages of embryonic development.
10: Molecular Homology
11: Molecular Homology is when a species is less different and more related. The closer they are o the tree of life the more they have in common with each other.
13: Biogeoqraphy is the geographic distribution of species. Species in a discrete geographic area tend to be more closely related to each other than to species in distant geographic areas. | Darwin studied the finches of the Galapagos Islands. He came to the realization that the finches are all closely related, but different.
14: Fossil Record | The Fossil Record is when past organisms give physical remnants of structure for homology comparison.
15: Fossils also further provided evidence for hereditary and for descent with modification. | For example, humans are the only living "branch" of our tree.