terms Flashcards
Phylogenies
The evolutionary history of a group
Homology
Similar structures in different organisms
Synapomorphies
Homologous traits or states that are shared among species . they share ancestors
Symplesiomorphy (Homoplasy)
Shared derived similarities that are not based on a singular common origin. but on a independent origin. diff taxa
Types of Homoplasy Convergent Evolution:
Shared derived similarities not based on a common origin; Wings. birds, bats
Types of Homoplasy Reversal
back mutation leading to an ancestral state. Aquatic life for fish, think whales
Origin of Arthropods
related to Annelida Sister group is nematodes
Covergeny Evolution
Similar selection pressures lead to analogous traits.
Paleoptera
Oldest group of insects with flight Have aquatic larvae
Plecoptera
Wings that fold
Neoptera
Can not fold wings
