Phylogeny Flashcards
Phylogeny
Evolutionary history of a group of species or group of related species
Systematics
Classifies organisms and determines their evolutionary relationships
Fossil, molecular, and genetic data to infer evolutionary relationships
Taxonomy
Ordered division and naming of organisms
Binomial
2 part naming system of species
Developed by Carolus Linnaeus
Branch point
Divergence of 2 species
Sister taxa
Groups that share an immediate common ancestor
Rooted tree
Includes a branch that represents the last common ancestor of all taxa in the tree
Basal taxon
Diverges early in the history of a group and originates near the common ancestor of the group
Polytomy
Branch from which more than 2 groups emerge
Early taxonomy
2 kingdoms: plants and animals
5 kingdoms
Monera (prokaryotes), protista, plantae, fungi, and anamalia
3 domains
Bacteria, archaea, eukarya
Monophyletic group
Common ancestor
All descendants
Paraphyletic group
Common ancestor
Not all descendants
Polyphyletic group
2 or more ancestors