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Chapter 1, Section 4. Classification – Grouping of similar objects.

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Presentation on theme: "Chapter 1, Section 4. Classification – Grouping of similar objects."— Presentation transcript:

1 Chapter 1, Section 4

2 Classification – Grouping of similar objects

3 Classification Brief History – More than 2,000 years ago, Aristotle grouped organisms into plants and animals – In late 18 th century, Linnaeus developed a system of classification based on similar structures

4 Classification Modern Classification – Based on phylogeny Phylogeny is the evolutionary history of an organism Phylogeny is determined by looking at similarities in: structure fossils hereditary information early stages of development

5 Classification Modern Classification – Organisms are grouped into six kingdoms Animals Plants Protists Fungi Archaebacteria Eubacteria – Some systems break organisms into three domains before they are broken into kingdoms

6 Classification Modern Classification KingdomKids PhylumPlaying ClassCatch OrderOn FamilyFreeways GenusGet SpeciesSmooshed Organisms of the same species can mate and produce fertile offspring

7 Scientific Names Binomial Nomenclature – 2 word system of naming organisms – Developed by Linneaus – First word identifies genus A genus is a group of similar species – Second word identifies something about the organism Called the specific epithet

8 Scientific Names Why use scientific names? – Helps avoid mistakes – Groups organisms with similar evolutionary histories together – Gives descriptive information about the species – Allows information about the organism to be shared easily and efficiently

9 Tools for Identifying Organisms Dichotomous Key – Detailed list of characteristics used to identify organisms

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