Classification

A. How do we tell the difference between things? I. Classification concepts A. How do we tell the difference between things? B. Taxonomy is the science of classification. C. Binomial nomenclature is a two part system for naming and classifying organisms. 1. Aristotle divided his groups into plants and animals. 2. This system was developed by Carolus Linnaeus. 3. The first part is a noun, called the genus. The genus is a broad category and contains many species. 4. The second part is called the species, an adjective that is specific.

2. Scientists also looked at the development of the animals. D. Relationships between animals 1. Scientists began to look at the bone structures of organisms and fossils. 2. Scientists also looked at the development of the animals. 3. As technology advanced scientists looked at the DNA and proteins for similarities. E Phylogeny is the evolutionary history of the organism.

1. Kingdom 2. Phylum 3. Class 4. Order 5. Family 6. Genus 7. Species II. System of classification A. There are seven taxons, each added taxon becomes more specific. 1. Kingdom 2. Phylum 3. Class 4. Order 5. Family 6. Genus 7. Species

Kingdom

Phylum

Class

Order

2. Now there is a five kingdom system B. The kingdom problem 1. In the two kingdom system only plants and animals were classified. The discovery of new organisms that did not fit into either or fit into both kingdoms. 2. Now there is a five kingdom system 1. Monera 2. Protista 3. Fungi 4. Plantae 5. Animalia