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:
“A quality is something capable of being completely embodied. A law never can be embodied in its character as a law except by determining a habit. A quality is how something may or might have been. A law is how an endless future must continue to be.”
—Charles Sanders Peirce (1839–1914)