686
edits
Changes
Jump to navigation
Jump to search
Line 17:
Line 17: + + + + + +
Later Developments of Linnaean Taxonomy
While the system is still in almost universal use for the naming and categorizing of creatures -- especially in the form of the [[binomial nomenclature]], where species are given a scientific, Latinate name comprised of a generic and specific descriptor (e.g. the common [[wombat]] is known as ''Vombatus ursinus'') -- it has largely been replaced as a framework for describing origins by creation science's [[baraminology]] and the evolutionists' [[cladistics]].
While the system is still in almost universal use for the naming and categorizing of creatures -- especially in the form of the [[binomial nomenclature]], where species are given a scientific, Latinate name comprised of a generic and specific descriptor (e.g. the common [[wombat]] is known as ''Vombatus ursinus'') -- it has largely been replaced as a framework for describing origins by creation science's [[baraminology]] and the evolutionists' [[cladistics]].
==Later developments since Linnaeus==
Over time, our understanding of the relationships between living things has changed. Linnaeus could only base his scheme on the structural similarities of the different organisms. The greatest change was the generally understood classifications ought to reflect the [[phylogeny]] of organisms, by grouping each taxon so as to include the common ancestor of the group's members (and thus to avoid [[polyphyly]]). Such taxa may be either [[monophyletic]] (including all descendants) such as genus [[Homo (genus)|Homo]], or [[paraphyletic]] (excluding some descendants), such as genus [[Australopithecus]].
Originally, Linnaeus established three kingdoms in his scheme, namely [[Plant]]ae, [[Animal]]ia and an additional group for [[minerals]], which has long since been abandoned. Since then, various life forms have been moved into three new kingdoms: [[Monera]], for [[prokaryote]]s (i.e., bacteria); [[Protist]]a, for protozoans and most algae; and [[fungus|Fungi]]. This five kingdom scheme is still far from the [[phylogeny|phylogenetic]] ideal and has largely been supplanted in modern taxonomic work by a division into three domains: [[Bacterium|Bacteria]] and [[Archaea]], which contain the prokaryotes, and [[Eukaryote|Eukaryota]], comprising the remaining forms. This change was precipitated by the discovery of the [[Archaea]]. These arrangements should not be seen as definitive. They are based on the [[genome]]s of the organisms; as knowledge on this increases, so will the categories change.
== References ==
== References ==
<references/>
<references/>