Phylogeny And The Tree Of Life Flashcards
What is phylogeny?
It is the evolutionary history of a species or group of species, traits due to shared ancestory used to classify organisms into groups that reflect their evolutionary history
How are scientific names written?
Written as the Genus species name
Genus is capitalized
Species is lowercase
Entire scientific name is italicized
Used by the entire scientific community
What is an outgroup?
The most distant related tax on in a phylogeny
Not all closely related organisms…
Look alike
Trees show common ancestry but not when an ancestor…
Lives or when speciation occurred exactly
Do not assume that a species on a phylogeny…
Evolved from the species next to it
Phylogenies represent hypothesis about…
How organism in a tree are related to each other
Pylogenies are modified when…
new evidence is available
How are phylogenies made?
Phylogenies are built from morphological and/or molecular data
Look for homologous traits
Use different programs designed to build phylogenetic trees
