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Chapter 17 Classification of Organisms Section 1 Biodiversity

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Page 1: Section 1 Biodiversity. Although scientists have classified almost 2 million species, there are likely many more

Chapter 17 Classification of Organisms

Section 1 Biodiversity

Page 2: Section 1 Biodiversity. Although scientists have classified almost 2 million species, there are likely many more

biodiversity- the variety of organisms that exist

Although scientists have classified almost 2 million species, there are likely many more

Page 3: Section 1 Biodiversity. Although scientists have classified almost 2 million species, there are likely many more

Taxonomy- the science of describing, naming and classifying organisms

Various naming systems have been used over the years

Page 4: Section 1 Biodiversity. Although scientists have classified almost 2 million species, there are likely many more

Aristotle

Classified organisms into two taxa: plants and animals

Taxa= groups, taxon- group

Page 5: Section 1 Biodiversity. Although scientists have classified almost 2 million species, there are likely many more

Aristotle’s System

Animals Plants

Classified based on where they lived; land, water or air

Classified based on stem differences

Page 6: Section 1 Biodiversity. Although scientists have classified almost 2 million species, there are likely many more

The Linnaean System Grouped

organisms according to their form and structure

(morphology) Had seven

levels Most like the

system we used today

Page 7: Section 1 Biodiversity. Although scientists have classified almost 2 million species, there are likely many more

Linnaeus’ hierarchy Kingdom Phylum Class Order Family Genus Species

KingPhillipCame Over For Ginger Snaps

Linnaeus grouped structurally similar organisms of a single type into the species category.

Page 8: Section 1 Biodiversity. Although scientists have classified almost 2 million species, there are likely many more

Today’s system uses the added level of “domain” above kingdom

Linnaeus also gave organisms a species name a.k.a scientific name with two parts:

Genus (first letter capitalized) Species identifier (all lowercase) **Both underlined or italicized

Page 9: Section 1 Biodiversity. Although scientists have classified almost 2 million species, there are likely many more

Human Classification

Our scientific name: Homo sapiensOur genus name is Homo Our species identifier is sapiens

Page 10: Section 1 Biodiversity. Although scientists have classified almost 2 million species, there are likely many more

This two part naming system is known as

Binomial nomenclature

Chaos chaos

Names often describe the organism

Page 11: Section 1 Biodiversity. Although scientists have classified almost 2 million species, there are likely many more

In addition… Some species are given subspecies

names torefer to the geographic area in which

they live

Terrapene carolina triunui

Page 12: Section 1 Biodiversity. Although scientists have classified almost 2 million species, there are likely many more

Various ranges of Eastern Box Turtles


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