BIOL 1020U Lecture Notes - Lecture 5: Last Universal Common Ancestor, Phylogenetics, Binomial Nomenclature
Document Summary
Phylogenetics : uses anatomical or molecular features to depict relationships as phylogenetic trees. Taxonomy : provides hierarchical classification in more and more inclusive groups. Phylogeny: the process of speciation can be depicted in a phylogenetic tree. Sister groups: two groups are considered to be each others" closest relatives if they share a common ancestor not shared by any other group, two groups that are each others" closest relatives are called. Page | 2: the closeness of the relationship is determined by looking to see how recently two groups share a common ancestor (node, nodes can be rotated without changing evolutionary relationships. Information about evolutionary relationships is found in the order of the nodes over time, not the order of the groups along the tips: evolution is not progressive toward perfection or complexity. Eukarya: classification reflects our understanding of phylogenetic relationships, and taxonomic hierarchy reflects the order of branching. Common descent from an ancestor that had the same character state =
