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-Sorting It All Out -The Six Kingdoms
Classification -Sorting It All Out -The Six Kingdoms
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Why Classify? Classification: the division of organisms into groups based upon similar characteristics Scientists classify organisms to help make sense and order of the many kinds of living things in the world Approximately 2 million organisms have been identified and named to date Estimates suggest that between 5 and 30 million organisms exist 2/3 of these organisms are insects 99% of all species identified are smaller than a bumblebee!!
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How Do Scientists Classify Organisms?
Before the 1600s, scientists divided organisms into two groups – plants and animals In the 1700s, a Swedish scientist named Carolus Linnaeus founded modern taxonomy Taxonomy: science of describing, classifying, and naming living things Linnaeus tried to classify all living things based on their shape and structure Described a seven level system of classification still used today – KINGDOM, PHYLUM, CLASS, ORDER, FAMILY, GENUS, SPECIES “Kings Play Chess On Fine Gold Sets”
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Classification Today Scientists use shared characteristics to hypothesize how closely related living things are The more shared characteristics organisms have, the more closely related they are Cladograms: branching diagrams showing the similarities and differences between organisms
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Levels of Classification (now use 8 levels with the addition of domain)
Domain (Archae, Bacteria, Eukarya) Kingdom (Archaebacteria, Eubacteria, Protista, Fungi, Plantae, Animalia) Phylum (Division – used for plants) Class Order Family Genus Species “Do Kings Play Chess On Fine Gold Sets?”
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Domain Kingdom Phylum Class Order Family Genus Species Eukarya
Animalia Chordata Mammalia Carnivora Felidae Panthera leo
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Kidspiration by Riedell Source: see end of show
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Kidspiration by Riedell Source: see end of show
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Kidspiration by Riedell Source: see end of show
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Kidspiration by Riedell Source: see end of show
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Kidspiration by Riedell Source: see end of show
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Kidspiration by Riedell Source: see end of show
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Kidspiration by Riedell Source: see end of show
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Do Kings Play Chess On Fine Gold Sets!
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WHY USE SCIENTIFIC NAMES??
Always the same for a specific kind of organism no matter how many common names there might be Binomial Nomenclature: Linnaeus’ system of giving each organism a two-part name consisting of a genus and a species name Genus name is ALWAYS capitalized Species name is NEVER capitalized Scientific name is underlined OR italicized! WHY USE SCIENTIFIC NAMES??
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Confusion in Using Different Languages for Names
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Latin Names are Understood by all Taxonomists
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Common names can vary Example: ______________ ______________
Image from: Example: ______________ ______________ . . . are all names for the same animal mountain lion puma catamount cougar By using a _____________________________, scientists can be sure they are discussing the same organism universally accepted scientific name
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Streifenhornchen (______) Tamia (______) Ardilla listada (______)
Common names vary Chipmunk ________ (English) Streifenhornchen (______) Tamia (______) Ardilla listada (______) German Italian Spanish Image from:
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Dichotomous Keys An aid that is used to identify organism and that consists of the answers to a series of questions EXAMPLE: LEAF Dichotomous Key EXAMPLE: Fish Classification Key EXAMPLE: Arachnids and Insects Key
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Six Kingdoms of Life Archaebacteria
Organisms: Methanogens, Halophiles, Thermophiles, Cell Type: Prokaryotic Metabolism: Depending on species - oxygen, hydrogen, carbon dioxide, sulfur, sulfide may be needed. Nutrition Acquisition: Depending on species - nutrition intake may by absorption, non-photosynthetic photophosphorylation, or chemosynthesis. Reproduction: Asexual reproduction by binary fission, budding, or fragmentation.
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Six Kingdoms of Life Eubacteria
Organisms: Bacteria, Cyanobacteria(blue-green algae), Actinobacteria Cell Type: Prokaryotic Metabolism: Depending on species - oxygen may be toxic, tolerated, or needed for metabolism. Nutrition Acquisition: Depending on species - nutrition intake may by absorption, photosynthesis, or chemosynthesis. Reproduction: Asexual reproduction
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Six Kingdoms of Life Protista
Organisms: Amoeba, green algae, brown algae, diatoms, euglena, slime molds Cell Type: Eukaryotic Metabolism: Oxygen is needed for metabolism. Nutrition Acquisition: Depending on species - nutrition intake may be by absorption, photosynthesis, or ingestion. Reproduction: Mostly asexual reproduction. Meiosis occurs in some species.
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Six Kingdoms of Life Fungi
Organisms: Mushrooms, yeast, molds Cell Type: Eukaryotic Metabolism: Oxygen is needed for metabolism. Nutrition Acquisition: Absorption Reproduction: Asexual or sexual reproduction occur.
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Six Kingdoms of Life Plantae
Organisms: Mosses, angiosperms (flowering plants), gymnosperms, liverworts, ferns Cell Type: Eukaryotic Metabolism: Oxygen is needed for metabolism. Nutrition Acquisition: Photosynthesis Reproduction: Some species reproduce asexually by mitosis. Other species exhibit sexual reproduction.
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Six Kingdoms of Life Animalia
Organisms: Mammals, amphibians, sponges, insects, worms Cell Type: Eukaryotic Metabolism: Oxygen is needed for metabolism. Nutrition Acquisition: Ingestion Reproduction: Sexual reproduction
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