topic3-evidence for Evolution

G picture ab intermediate btw dinosaur and bird

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Unformatted text preview: for Descent with Modification: Transitional Forms intermediate forms -fossils between the past and present e.g. picture A/B--> intermediate btw dinosaur and bird -feathers are modified scales After Futuyma 2005 Transitional forms in the evolution of whales (Figure 2.13, pg. 49) whales evolved from a land mammal -wolf/dog mammal that lived near the shore Relatedness Darwin’s trip to the Galapagos and his examination of mockingbirds, finches and tortoises led him to recognize the relationships within these groups through shared ancestry Phylogenetic Trees Darwin recognized that the patterns among closely related forms found on different islands are inconsistent with the idea of special creation, but rather provided evidence of descent with modification, in a way that can be represented by a tree Darwin: The First Phylogenetic Tree tips represent taxa or organisms that exist today --> interested in that organisms evolution Introduction to Phylogenetic Trees root of the tree, first common ancestor represents most recent common ancestor to taxon 4, 5,6 (does not exist today) rotate node 180 mirror images read tree by looking at the branching patterns rotate node 180, same branching pattern rectangular version of the tree in the box Phylogenetics: The study of ancestor/ descendent relationships Phylogeny: an hypothesis of ancestor/ descendent relationships EXAM QUESTION: PICK THE TREE THAT IS...
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