Classification the grouping of information or objects based on

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This Powerpoint is a compilation of presentations found on the Internet. Unfortunately, the authors did not include their names on their work.

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p. 35 – Classification of Living Things

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Classification.

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Classification the grouping of information or objects based on Taxonomy is the science of grouping and naming organisms. Classification the grouping of information or objects based on similarities.

History of Taxonomy

Early classification systems Aristotle grouped animals according to the way they moved

The modern classification system : Developed by Carolus Linnaeus Consists of 7 levels: Kingdom Phylum Class Order Family Genus Species Carl Linnaeus 1708-1778 Father of Taxonomy Swedish botanist, zoologist and physician

Phenetics -Similar properties -form or structure (morphology)

Helpful way to remember the 7 levels King Philip Came Over For Grape Soda. King Philip Came Over For Green Skittles.

New - Phylogenetics cladistics DNA sequencing

We only know about a fraction of the organisms that exist or have existed on Earth. Taxonomists give a unique scientific name to each species they know about whether it’s alive today or extinct. The scientific name comes from one of two “dead” languages – Latin or ancient Greek. Why use a dead language?

Devil Cat

Ghost Cat

Mountain Lion

Screaming Cat

Puma

Florida Panther

Cougar

There are at least 50 common names for the animal shown on the previous 7 slides. Common names vary according to region. Soooo……why use a scientific name?

Binomial Nomenclature a two name system for writing scientific names. The genus name is written first (always Capitalized). The species name is written second (never capitalized). Both words are italicized if typed or underlined if hand written. Example: Felis concolor or F. concolor Which is the genus? The species?

"Formal" scientific names should have a third part, the authority "Formal" scientific names should have a third part, the authority. The authority is not italicized or underlined. The authority is written as an abbreviation of the last name of the person responsible for naming the organism. Since Carolus Linnaeus was the first person to name many plants, the L. for Linnaeus is very common in plant scientific names. An example is Quercus alba L.

The Dichotomous Key A key is a device for easily and quickly identifying an unknown organism. The dichotomous key is the most widely used type in biological sciences. The user is presented with a sequence of choices between two statements, couplets, based on characteristics of the organism. By always making the correct choice, the name of the organism will be revealed.

1. A. one pair of wings B. Two pairs of wings