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Scientifically describe two ways animals are different from plants. Scientifically describe two ways animals are different from bacteria.
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Introduction to Classification
Chapter 17 Sections 1-3 Pages
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Biodiversity Ecologists have classified over 2 million species
Many more to be discovered Taxonomy: The science of describing, naming, and classifying organisms into a taxonomic system Taxon: Any particular group within a taxonomic system
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Life is organized into increasingly specific groups
Domain Kingdom Phylum Class Order Family Genus Species
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Levels Domain Kingdom Phylum Class Order Family Genus Species
Specificity
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Mnemonic to remember order
K P C O F G S
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Dutch
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Kings
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Play
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Chess
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On
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Funny
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Green
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Squares
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Organization/Levels Levels Mnemonic Example (Tiger)
Domain Dutch Eukarya Kingdom Kings Animalia Phylum Play Chordata Class Chess Mammalia Order On Carnivora Family Funny Felidae Genus Green Panthera Species Squares Panthera tigris
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Classifying humans Domain: Eukarya Kingdom: Anamalia Phylum: chordata
Class: Mamalia Order: Primates Family: Hominidae Genus: Homo Species: Sapien
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Three Domains Created based on rRNA Evidence
Three Domains include six Kingdoms Domain Bacteria (Prokaryotes) Domain Archaea (Prokaryotes) Domain Eukarya (Eukaryotes)
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KINGDOM EUBACTERIA unicellular prokaryotes true bacteria
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KINGDOM ARCHEABACTERIA
unicellular prokaryotes chemosynthetic extremophiles
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KINGDOM PROTISTA Heterotrophic and autotrophic eukaryotes
unicellular or multicellular Ex. kelp
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KINGDOM FUNGI Heterotrophic eukaryotes
Absorb nutrients from surroundings Ex. Yeast, mold, mushrooms, athlete’s foot
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Kingdom Plantae Multicellular Eukaryotes Autotrophic by photosynthesis
Ex. Mosses, ferns, conifers, flowering plants
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KINGDOM ANIMALIA Eukaryotic All multicellular Heterotrophic
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Six Kingdoms Domain Kingdom Cell Type Number of Cells Nutrition
Archaea Archaebacteria Prokaryotic Unicellular Autotrophy and Heterotrophy Bacteria Eubacteria Eukarya Protista Eukaryotic Unicellular and Multicellular Fungi Plantae Multicellular Autotrophy Animalia Heterotrophy
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Binomial Nomenclature
How scientists name species Invented by Carolus Linnaeus
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Binomial Nomenclature
How scientists name species Invented by Carolus Linnaeus Scientific (species) Name Genus Name + species name Written in italics Genus is always capitalized
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Value Clarity Binomial names avoid confusion created when using common names to refer to a species. Example: In English-speaking parts of Europe, the bird called a "robin" is Erithacus rubecula. In English-speaking North America, a "robin" is Turdus migratorius.
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video
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SYSTEMATICS The goal is to classify organisms in terms of their natural relationships Uses similarities in appearance, embryos, chromosomes, proteins, and molecular molecules (DNA & RNA) Two types: phylogenetics and cladistics
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PHYLOGENETICS Phylogenetics: the analysis of the evolutionary or ancestral relationships among taxa Based on common ancestors Phylogenetic Tree
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Phylogenetic Trees Uses chromosomes and molecular molecules such as DNA, RNA, and proteins
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CLADISTICS Uses shared and derived characteristics as the criteria for grouping taxa Ex. feathers unique to birds
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