Classification = the grouping of objects or organisms based on a set of criteria.
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2 Classification = the grouping of objects or organisms based on a set of criteria.
3 TAXONOMY = A branch of biology that groups and names organisms.
4 I. History A. Aristotle ( B.C.) Greek philosopher 1 st method of classification 2 groups: plants & animals
5 I. History B. Carolus Linnaeus ( ) Swedish botanist System we still use today Binomial nomenclature (2 word naming system) Every living organism has a genus name and a species name!
6 Genus & Species Name: Genus species: scientific name Ex: Homo sapiens ocommon name Ex: = human beings scientific name Ex: Acinonyx jubatus ocommon name Ex: Cheetah
7 Genus & Species Name: Writing scientific names (genus & species): The genus name is capitalized; the species name is lowercase Both genus and species names are always: ounderlined or Italicized
8 II. Why are living things organized? Provides logic and organization Universal understanding-useful tool Important to economy- discoveries! onew sources of lumber, medicines, energy, etc
9 III. How are living things classified? A. Taxa- series of categories, each one larger than the previous one Species (only one) Genus Family Order Class Phylum Kingdom Domain(Very Broad Category)
10 III. How are living things classified? B. Classified by similarities in: 1. Developmental stages 2. Biochemical analysis (DNA) 3. Behavioral patterns
11 IV. DOMAINS: Organisms are classified into domains according to cell type and structure Organisms are classified into kingdoms according to cell type, structure, and nutrition
12 2 Cell Types: 1) Eukaryotic cells = have membrane-bound nucleus and organelles; usually more complex than prokaryotic cells 2) Prokaryotic cells = does NOT have a nucleus or other membrane-bound organelles
13 3 Domains: 1) Bacteria 2) Archea (pronounced- ar KEE uh) 3) Eukarya
14 A. Bacteria Prokaryotes Cell walls contain peptidoglycan (polymer of sugars) Contains Kingdom Bacteria E. coli
15 B. Archea More ancient than bacteria Prokaryotes Cell walls DO NOT contain peptidoglycan Live in extreme environments Boiling hot springs, salty latkes, thermal vents on the oceans floors, mud of marshes where there is NO oxygen
16 C. Eukarya Eukaryotes Contains Kingdom Protists, Kingdom Fungi, Kingdom Plants, Kingdom Animals
17 V. THE SIX KINGDOMS: 1. BACTERIA 2. ARCHAEA 3. PROTISTS 4. FUNGI 5. PLANTS 6. ANIMALS
18 Flow Chart of Domains & Kingdoms: 3 Domains 6 Kingdoms Bacteria Bacteria Archaea Archaea Protists Eukarya Plants Fungi Animals
19 A. BACTERIA Cell type prokaryote Cell walls with peptidoglycan Unicellular Autotroph (organism that makes their own food) or heterotroph (organism that gets its nutrients by feeding on other organisms)
20 BACTERIA (continued) Common bacteria Ex: bacteria you would find on your skin Ex: streptococcus bacteria causes strep throat Ex: E. coli Streptococcus E. Coli
21 B. ARCHAEA Cell type prokaryote Cell walls DO NOT contain peptidoglycan Unicellular Autotroph or heterotroph Hot Springs Deep Sea Vents
22 C. PROTISTS Most diverse group Cell type eukaryote Unicellular and multicellular Some plant-like, animal-like and fungus-like DO NOT have organs Usually live in moist environments Ex: paramecium, slime mold, kelps
23 C. FUNGI Cell type eukaryote Most multicellular Heterotrophic - absorb nutrients obtained by decomposing dead organisms and wastes in environment Cell walls with chitin (polymer) Ex: mushrooms, molds
24 D. PLANTS Cell type eukaryote Multicellular Photosynthetic (autotrophs) Most have cellulose in their cell walls Tissues organized into organs (roots, stems, leaves)
25 E. ANIMALS Cell type eukaryote Multicellular Consumers that eat and digest other organisms for food No cell walls Have tissues organized into complex organ systems
26 Kingdom Characteristics Domain Bacteria Archaea Eukarya Kingdom Bacteria Archaea Protists Fungi Plants Animals Cell Type Prokaryotic Eukaryotic Cell Walls Contains peptidoglycan Does NOT contain peptidoglycan Some with cellulose Chitin Cellulose NO Cell walls Number of Cells Unicellular Unicellular & Multicellular Most Multicellul ar Multicellular Nutrition Autotroph or heterotroph Heterotroph Autotroph Heterotroph
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