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Classification of Life
Kingdoms and Domains
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Why classify? To study the diversity of life, biologists use a classification system to name organisms and group them in a logical manner.
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Words to Remember: Taxonomy is the branch of biology that organizes living things based on shared characteristics and evolutionary history A domain is the largest group into which life is organized. There are 3 domains: Archaea, Bacteria, and Eukarya. A prokaryote is an organism whose cells do not have a nucleus or membrane-bound organelles. Eukaryotes are organism with cells that have a nucleus enclosed by a membrane.
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Levels of Classification (Taxon/Taxa)
Kingdom Continent Phylum Country Class State Order County Family City Genus Street species House #
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PHYLUM Chordata GENUS Ursus KINGDOM Animalia CLASS Mammalia
ORDER Carnivora FAMILY Ursidae GENUS Ursus SPECIES Ursus arctos
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King Phillip Came Over For Good Spaghetti
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Binomial Nomenclature
A two name naming system that was developed by a Swedish scientist named Carolus Linnaeus
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Example: Tyranosaurous rex
The Genus name is CAPITALIZED, followed by the Species name in lower case. Both names are Underlined or put in Italics.
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Examples of Scientific Names
Wolf: Canis lupus Cat: Felis catus CHicken: Gallus gallus Human: Homo sapiens Emperor penguin: Aptenodytes forsteri Apple: Malus domestica Sunflower: Helianthus annuus Carrot: Daucus carota Orange: Citrus sinensis
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Examples of Scientific Names
Wolf: Canis lupus Cat: Felis catus CHicken: Gallus gallus Human: Homo sapiens Emperor penguin: Aptenodytes forsteri Apple: Malus domestica Sunflower: Helianthus annuus Carrot: Daucus carota Orange: Citrus sinensis
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The 3-Domain System Domain: is a more inclusive category than any other – larger than a kingdom.
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The Three – Domain System
Domain: is a more inclusive category than any other – larger than a kingdom. Three Domains: Eukarya: composed of protists, fungi, plants, and animals. Bacteria: corresponds to eubacteria Archaea: corresponds to the kingdom archaebacteria.
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Domain Bacteria Unicellular and prokaryotic.
Thick rigid cell walls that surround a cell membrane. Cell walls contain a substance known as peptidoglycan.
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Domain Archaea Unicellular and prokaryotic members that live in some extreme environments – volcanic hot springs, brine pools, and black organic mud totally devoid of oxygen. Cell walls lack peptidoglycan and cell membranes contain unusual lipids.
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Consists of all organisms that have a nucleus.
Domain Eukarya Consists of all organisms that have a nucleus. Organized in the following kingdoms: Protists, animals, plants, and fungi.
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(this will take up pages 5 -6)
Go to page 459 and copy the entire table.
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Carolus Linnaeus Binomial Nomenclature
A two name naming system that was developed by a Swedish scientist named Carolus Linnaeus
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Pictures go in the bottom
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Kingdom ARCHAEBACTERIA
Cell Type:_____________ Cell Structures:________________ Number of Cells:________________ Mode of Nutrition:____________________ Examples:_______________________ Kingdom EUBACTERIA Cell Type:_____________ Cell Structures:________________ Number of Cells:________________ Mode of Nutrition:____________________ Examples:_______________________
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The 6 Kingdoms Page 7
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Kingdom Eubacteria Page 8 The 3 shapes of bacteria (p.473) Cocci =
= peptidoglycan present in cell walls = lives almost anywhere Page 8 The 3 shapes of bacteria (p.473) Cocci = Bacilli = Spirilla =
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Kingdom Archaebacteria
No peptidoglycan Loves extreme environments (hot springs, brine pools, mud, etc) Bacterial Growth and Reproduction (p475) Binary Fission (Define & Draw for all 3) Spore Formation Conjugation Page 9
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Draw 3 Fungi from p535 p10 Define these words: Chitin (p527)
Kingdom Fungi Define these words: Chitin (p527) Saprobes (p537) Lichens (p540) Mycorrhizae (p541) Draw 3 Fungi from p535 p10
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Kingdom Protista Protists = p497 PLANT-LIKE PROTISTS
Euglena (p507) Diatoms (507) Dinoflagellates (p508) Red Algae (p510) Brown Algae (p511) Chlamydomonas (513) Protists = p497 ANIMAL-LIKE PROTISTS Draw: Zooflagellates (499) Sarcodina (p500) Ciliates (p501) Radiolarian (p497) List 3 Human uses of algae: (p. 515)
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