Phylogeny = evolutionary history of an organism; Taxonomy Ch. 18.2 (p.342-346) Phylogeny = evolutionary history of an organism; Classification is based on evolutionary relationships Phylogenetic tree = a family tree that shows evolutionary relationships Fossil record Morphology (body parts and shapes) DNA, RNA Have you heard the term “morph” before? Relate it to the scientific definition.

Taxonomy Ch. 18.2 (p.342-346) What does a branch point represent between 2 evolutionary lines?

Taxonomy Ch. 18.2 (p.342-346) Is the wolf more closely related to the badger or the leopard?

Taxonomy Ch. 18.2 (p.342-346) Is a tuna fish more closely related to a shark or a human?

Taxonomy Ch. 18.2 (p.342-346) Is a tuna fish more closely related to a shark or a human? A human. It does not about distance it is about common ancestor.

Implies a common ancestor Clade = group with shared characteristic Taxonomy Ch. 18.2 (p.342-346) Cladogram = phylogenetic tree that branches at common shared characteristics. Implies a common ancestor Clade = group with shared characteristic Birds have… Mammals have… Insects have…

Taxonomy Ch. 18.2 (p.342-346)