Determining Homology
Systematists identify two forms of homology: primary homology is that implied by a researcher, who states a belief that two characters share an ancestry; secondary homology is implied by parsimony analysis, where a character that only occurs once on a tree is taken to be homologous.
Read more about this topic: Homology (biology)
Famous quotes containing the word determining:
“The true rule, in determining to embrace, or reject any thing, is not whether it have any evil in it; but whether it have more of evil, than of good. There are few things wholly evil, or wholly good.”
—Abraham Lincoln (1809–1865)