Also known as phylogenetics
; an attempt to organise
life into a tree-like data structure. The 'root
' is rather complicated, since life emerged
from more of a soup
than a single creature. This task is complicated by the difficulty of selecting the 'correct' (actual, historical) tree from the forest
of similar trees. It is a much more rigorous
process if done with molecular data (protein sequence
) rather than anatomical
information. However, disagreement over molecular evolution models (Shimomura's neutral drift
theory, for example) could give different results.
See: Clusters of Orthologous Groups.