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Classifications and Systematics (Levels of Taxonomic Categories (The most…
Classifications and Systematics
Concept
Systematics
Systematics is to understand each of these evolutionary lines.
Nomenclature
That reflects their relationships accurately.
To have a system of names.
Levels of Taxonomic Categories
The most fundamental level of classification is the species.
Monophyletic
Polyphyletic
Genus
Development of Concepts of Evolution and Classification
Family
The level above genus is family.
The level above family are :
Order
Class
Division
Kingdom
Taxon is used to refer to any of the above groups in a general way.
Cladistics
It is a method of analyzing these phylogenetic, evolutionary relationships.
Two Distinct Reasons
They have descended from a common ancestor.
They have undergone convergent evolution.
Synapomorphies
Homologous features
Homoplasies
Analogous features
Node
Common ancestor
Apomorphy
Clade
Cladogram
A cladogram is a diagram that shows evolutionary patterns by means of a series of branches.
Other Types Of Classification Systems
Artificial Systems of Classification
They are only used as adjuncts to natural systems.
The Major Lines Of Evolution
All organisms are grouped into three domains.
Bacteria
Archaea
Eukarya
