Ch 23 Flashcards
System recognized specific groups of organisms, called genera
Roman system
Multiple names were given to describe organism
Polynomial system
System developed by Linnaeus which gave organisms genus and species
Binomial system
Evolutionary tree
Phylogeny
Group with common ancestor and all of its descendants
Monophyletic group
Group with a common ancestor and some of its defendants
Paraphyletic group
Group that does not include common ancestor
Poly phyletic group
An ancestral or primitive character
Plesiomorphy
A derived or specialized character
Apomorphy
Organisms were either plant or animal
Aristotelian system
An apomorphine shared by two or more groups which originated in their last common ancestry, classes are constructed this way
Synapomorphy
A character shared by a number of groups, but inherited from ancestors older than the last common ancestor
Symplesiomorphy
