classificationclassification biology i. standards s7l1. students will investigate the diversity of...
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ClassificationBiology I
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Standards
• S7L1. Students will investigate the diversity of living organisms and how they can be compared scientifically.
• a. Demonstrate the process for the development of a dichotomous key.
• b. Classify organisms based on physical characteristics using a dichotomous key of the six kingdom system (archaebacteria, eubacteria, protists, fungi, plants, and animals).
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1707-1778
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Who was Linnaeus?
The “father of modern taxonomy” was Carolus Linnaeus (Carl von Linné)
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What are taxa?
• The science of classifying organisms is called taxonomy
• Organisms are grouped into “taxa” based on their similarities to each other
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The Old System
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The old classification system is:
5 Kingdom Classification System:Monera: all prokaryotesProtista: single-celled eukaryotes (protists)Fungi: multi-cellular heterotrophic sessile eukaryotesPlantae: multi-cellular autotrophic sessile eukaryotesAnimalia: multi-cellular heterotrophic motile eukaryotes
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6 Kingdom Proposal
Archebacteria
EUbacteria
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• 6 Kingdom Classification System– Kingdom Eubacteria: true bacteria – (formerly in kingdom monera)– Kingdom A rchebacteria: extremophiles
(formerly in kingdom monera)– Kingdom Protista (same)– Kingdom Fungi– Kingdom Plantae– Kingdom Animalia
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What are the 3 Domains?
• 3 Domain System:– Archaea: prokaryotes; extremophiles– Eubacteria: prokaryotes; true bacteria– Eukarya: eukaryotes
• Protista• Fungi• Plantae• Animalia
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What are the 8 levels of classification?
DomainKINGDOM
PHYLUM CLASSORDERFAMILYGENUSSPECIES
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What mnemonic do we use to remember the 8 levels of classification?
Domain=Kingdom = Kings
Phylum = PlayClass = Cards
Order = OnFamily = Fat
Genus = GreenSpecies = Stools
Do
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•Organisms are grouped into smaller and smaller groups all the way down to their species•A speciesspecies is the most specific grouping and includes only organisms that can interbreed with each other and produce fertile offspring
What is the most specific classification level?
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Ursus americanus
American Black Bear
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How are organisms scientifically named?
Binomial Nomenclature: “a two-name system”First part of name: genus first letter always capitalizedSecond part of name: species first letter always lowercase
Entire name is underlined and italicized Names must be submitted for acceptance by original discoverer, and are generally Latin or Latinized
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The Six Kingdoms
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Domain Archaea
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Domain Archaea
Formerly part of the kingdom moneraMicrobiologists who study bacteria determined that the DNA of these are much different from other, true bacteriaMost Archaea live in extreme conditions (very hot, acidic/basic, sulfurous, etc)
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Domain Eubacteria
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Domain Eubacteria
• Formerly a part of the kingdom monera• Name means “true bacteria”• These are the kind of bacteria likely to make us sick, live in
our gut to help us digest food, or be used in the making of cheese
A.Bacilli
B.Streptococcus
C.Staphylococcus
D.Dicoccus
E.Spirilla
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Domain Eukarya
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Domain Eukarya
• Contains all of the eukaryotes (organisms with a nucleus in their cells)– Protista– Fungi– Plantae– Animalia
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Kingdom Protista
Amoeba Paramecium Giardia
Water Mold Slime Mold
Euglena DinoflagellatesDiatomBrown AlgaeGreen Algae
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Kingdom ProtistaIncludes All Protists:
EukaryoticUnicellular
Animal-Like Protists (protozoans)Pseudopods, Ciliates, FlagellatesExamples: Amoeba, Paramecia, Giardia
Plant-Like Protists (autotrophic)Euglenoids, Dinoflagellates, Diatoms, Green/Red/Brown Algae
Fungus-Like ProtistsExamples: Water molds, slime molds
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Kingdom Fungi
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Kingdom Fungi
• All eukaryotic, multicellular, heterotrophic, sessile organisms
• Includes: molds, mushrooms, rusts, lichens
• Mycorrhizal associations allow plants to absorb more water and nutrients from the soil
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Kingdom Plantae
Bryophyte (Moss)
Pteridophyte(Fern)
Pteridophyte(Fern)
Coniferophytes (Pine Trees) Angiosperm;
DicotAngiosperm;
Monocot
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Kingdom Plantae
All eukaryotic, multicellular, autotrophic, sessile organismsProduce their own food from sunlight and carbon dioxideCommon Phyla:
Bryophyta (mosses)Pteridophyta (ferns)Coniferophyta (conifers, like pine trees)Angiospermophyta (angiosperms, like flowering plants
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Human Classification
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Kingdom Animalia
• All eukaryotic, multicellular, heterotrophic, motile (most) organisms
• Common Phyla:– Porifera (sponges, corral) – Cnidaria & Ctenophora (jellyfish and similar
animals)– Platyhelmenthes (flat worms, tapeworms) – Nematoda (small unsegmented worms)
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Human Classification
• Domain: Eukarya• Kingdom: Animalia
• Phylum: Chordata• Class: Mammalia
• Order: Primates• Family: Hominidae
• Genus: Homo• Species: Sapien
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Note Guide
• Who was Linnaeus?
• What are taxa?
• The old classification system is:________ Kingdoms
• The new classification system there are:_______ Kingdoms• What is the difference between the 3 domains?
– 1.– 2.– 3.
• What are the 8 levels of classification?• 1)• 2)• 3)• 4)• 5)• 6)• 7)• 8)
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Note Guide (pg. 2)
• What mnemonic device do we use to remember the 8 levels of classification?
• What is the most specific classification level?
• How are organisms scientifically named?
• What are the six kingdoms of life?
• 1)
• 2)
• 3)
• 4)
• 5)
• 6)
• How would you fully classify a human?