BISC 1112 Chapter Notes - Chapter 26: Lineage Ii, Absolute Time And Space, Cladistics
Document Summary
Phylogeny- evolutionary history of a species or group of species: ex- phylogeny of lizards and snakes can show that they both evolved from lizards with legs, but evolving from different lineages of legged lizards. Thus, their legs evolved independently: systematics- discipline focused on classifying organisms and determining their evolutionary relationships. Family orders class phyla kingdoms domains: taxon- the named taxonomic unit at any level. Panthera is a taxon at the genus level. Linking classification and phylogeny: phylogenetic tree- evolutionary history of a group of organisms. Patterns classifying organisms into groups nested within more inclusive groups. Branch point (dichotomies)- each branch point represents divergence of 2 evolutionary lineages from a common ancestor. Branch 3 represents the common ancestor of taxa a, b, and c. Branch 4 being to the right of branch 3 indicates that taxa b and. C diverged after their shared lineage split from the lineage leading to taxon a.
