Taxonomy and Phylogeny or Animals Flashcards
taxonomy
formal system of naming and classifying species
systematics
classifying organisms based on similarity, biogeography
Carolus Linnaeus
classification scheme based on morphology
-binomial nomenclature
KPCOFGS
3 criteria for identifying species
- common descent
- reproductive community
- distribution (time and space)
species
constitue a population lineage with a history of evolutionary descent separate from other such lineages
homology
character similarity resulting from common ancestry
characters
organismal features used to construct a phylogeny
homoplasy (analogous)
mis-represents common ancestry
cladistics
classifies organisms into hierarchical monophyletic groups (actual process of evolution)
cladogram
ancestral relations between organisms- branching diagram
clade
group consisting of a single organism and all its descendants
monophyly
includes the most recent common ancestor an all descendants of that ancestor
paraphyly
it includes the most recent common ancestor of all members of a group and some but not all descendants of that ancestor
polyphyly
does not include the most recent common ancestor
-has atlas two separate evolutionary origins
convergent evolution
independent evolution of similar features in species of different lineages