BioEd Online Diversity of Life - Domain IV Part A: Biological Classification By Deanne Erdmann, M.S.

BioEd Online

Diversity of Life - Domain IV

Part A: Biological

Classification

By Deanne Erdmann, M.S.

www.BioEdOnline.orgBioEd Online

Why Do We Classify Organisms? Biologists group organisms to

represent similarities and proposed relationships.

Classification systems change with expanding knowledge about new and well-known organisms.

Tacitus bellus


Populus tremuloidesQuaking Aspen

Classification and Phylogeny Binomial Nomenclature Hierarchical Classification Systematics: Evolutionary Classification


Carolus von Linnaeus(1707-1778)

Swedish scientist who laid foundation for modern taxonomy

Binomial Nomenclature Carolus von Linnaeus Two-word naming system

Genus Noun, Capitalized,

Underlined or Italicized Species

Descriptive, Lower Case, Underlined or Italicized


Hierarchical Classification Taxonomic categories

Kingdom King Phylum Philip Class Came Order Over Family For Genus Green Species Soup


Kingdoms and Domains

Bacteria Archaea Eukarya

Bacteria Archaea Protista Plantae Fungi Animalia

Monera Protista Plantae Fungi Animalia

The three-domain system

The six-kingdom system

The traditional five-kingdom system


Systematics:Evolutionary Classification of Organisms Systematics is the study of the evolution of

biological diversity, and combines data from the following areas.

Fossil record Comparative homologies Cladistics Comparative sequencing of DNA/RNA among

organisms Molecular clocks


Taxonomic Diagrams

Mammals Turtles Lizards and Snakes

Crocodiles Birds Mammals Turtles Lizards and Snakes

Crocodiles Birds

CladogramPhylogeneticTree


Dichotomous Keys Identify Organisms Dichotomous keys versus evolutionary

classification Dichotomous keys contain pairs of contrasting

descriptions. After each description, the key directs the user to

another pair of descriptions or identifies the organism.

Example: 1. a) Is the leaf simple? Go to 2b) Is the leaf compound? Go to 32. a) Are margins of the leaf jagged? Go to 4b) Are margins of the leaf smooth? Go to 5


Thank You This concludes a brief review of biological

classification. You may find additional information on this

section of Domain IV, The Diversity of Life, in the expanded content talks, and in the notes below each slide in the slide library.

BioEd Online Diversity of Life - Domain IV Part A: Biological Classification By Deanne Erdmann, M.S.

Documents

Transcript of BioEd Online Diversity of Life - Domain IV Part A: Biological Classification By Deanne Erdmann, M.S.