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17.1 THE HISTORY OF CLASSIFICATION
WHAT YOU WILL LEARN-differences in methods of classifying-how to write scientific names-how to use a dichotomous key-the taxa in biological classification
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MAIN IDEA
-Biologists use a system of classification to ORGANIZE information about the diversity of living things
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READING Q’s
1-IDENTIFY: who developed the first commonly accepted system of classification?
-ARISTOTLE
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READING Q’s
2-CLASSIFY:Using Aristotle’s classification system, classify the following-
-DAISY- PLANT / herb-DOG-ANIMAL / land-WHALE-ANIMAL / water
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READING Q’s
3-EXPLAIN-how did Linnaeus’s system of classification build on Aristotle’s system?
-kept the morphological component-ADDED behavior
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READING Q’s
4-IDENTIFY-which is the correct name for this bird?
-Cardinalis cardinalis
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READING Q’s
5-DESCRIBE-how should a scientific name be written by hand?
-it should be underlined
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READING Q’s
6-COMPARE:
How is today's classification system different from
Linnaeus's system?
-shows EVOLUTIONARY relationships
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READING Q’s
7-DETERMINE:
At what level on the pyramid of taxa is the
American black bear distinguished from the Asiatic
black bear?
-shows SPECIES
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INSTRUCTOR LED CORNELL NOTES
17.1 CLASSIFICATION
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WHY CLASSIFY?
1-NAME/ORDER in logical manner to IDENTIFY relationships between
organisms
2-ASSIGNS universally accepted NAME to organisms
to ELIMINATE confusion
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CRITERIA for CLASSIFICATION
classification—grouping of objects based on a specified set of criteria
CRITERIA EXAMPLES:-physical characteristics-behavior of organisms-relationships between organisms
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BIOLOGICAL CLASSIFICATION
1-Aristotle -Formed the 1st known classification system
(2,000 yrs ago) -Plants and Animals
-based on: where they spent most of their life. -Air, Land and Water
2-Carolus Linnaeus-founded the modern taxonomy
-naming system based on PHYSICAL CHARACTERISTICS
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BIOLOGICAL CLASSIFICATION
BINOMIAL NOMENCLATURE-two part naming system based on LATIN
-GENUS:groups with many similar
characteristics-SPECIES:
specific to one organismRULES/EXAMPLES1-printed in ITALICS (underline if hand written)2-first name GENUS, second name SPECIES3-Genus always starts with CAPITAL letter4-species always starts with lower case
letter
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EXAMPLE
• Canis lupis• C. lupis
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Taxonomic STRUCTURE
KingdomPhylumClassOrderFamilyGenusSpecies
Large
Small
Kids Pick Candy Over Field Green Salads
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DICHOTOMOUS KEY
-TOOL used to identify group of organisms-OBSERVE characteristics of each organism-series of 2 CHOICES used to guide classification
PRACTICE: “key out” the kangaroo, cow, bee and spider
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EXAMPLE- Human Classification
Kingdom – AnimaliaPhylum – ChordataClass – MammaliaOrder – PrimataFamily – HominidaeGenus – HomoSpecies - Sapien
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GROUP WORK: GUIDED NOTES
-As a group complete the guided note sheet using your knowledge from the reading.
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TAXONOMY
taxonomy---science of NAMING organisms & CLASSIFYING them into groups
-based on natural relationships among organisms
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EARLY SYSTEMS OF CLASSIFICATION
IDENTIFY: -the parts of Linnaeus’ two-word naming system
genus
species
group of similar species
characteristicsof
organisms
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EARLY SYSTEMS OF CLASSIFICATION
DISTINGUISH: -the genus and specific name for species of modern humans
Homo sapians
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EARLY SYSTEMS OF CLASSIFICATION
IDENTIFY: 1- Which statement describes the Linnaean system of biological classification?it was based on behavioral and morphological similarities and differences among organisms2- In binomial nomenclature, the first part of an organism's name identifies the genus, and the second part identifies the:species 3-What is the correct way that the scientific name for the American black bear should appear in print?Ursus americanus
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TAXONOMIC CATEGORIES
REVIEW: -morphology—
-
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TAXONOMIC CATEGORIES
LABEL: the diagram of taxa
SPECIES
GENUS
FAMILY
ORDER
CLASS
PHYLUM
KINGDOM
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TAXONOMIC CATEGORIESCOMPARE data in the table below to determine which two animals are most closely related.
-_______________&________________SUPPORT your reasoning:-classification is IDENTICAL down to speciesANALYZE at which level the blue whale diverges from the other animals on the table--ORDER
COYOTE WOLF
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DICHOTOMOUS KEYAPPLICATION: Using the dichotomous key provided, IDENTIFY the Norns and write their scientific name in the blanks.
beverlus dallus rajus
kentuckyus californius walawala
dakotus yorkio