1. Classification of Living Things
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Classification of Living Things
the BIG idea
Scientists have developed a system for classifying the great diversity of living things.
7.1
Scientists develop systems for classifying living things.
7.2
Branching diagrams show biological relationships.
7.3
Classification systems change as scientists learn more.
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2. Scientists develop systems for classifying living things.
7.1
Scientists develop systems for classifying living things.
CALIFORNIA
Content Standards
7.3.d Students know how to construct a simple branching diagram to classify living groups of organisms by shared derived characteristics and how to expand the diagram to include fossil organisms.
dichotomous key
classification
taxonomy
binomial nomenclature
genus
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3. Scientists develop systems for classifying living things.
7.1
Scientists develop systems for classifying living things.
dichotomous key
Animalia
classification
Chordata
taxonomy
Reptilia
binomial nomenclature
Testudines
Spotted turtle Clemmys guttata
Emydidae
genus
Clemmys
Guttata
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Use an interactive dichotomous key.
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4. Branching diagrams show biological relationships.
7.2
Branching diagrams show biological relationships.
CALIFORNIA
Content Standards
7.3.d Students know how to construct a simple branching diagram to classify living groups of organisms by shared derived characteristics and how to expand the diagram to include fossil organisms.
cladogram
derived characteristic
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5. Branching diagrams show biological relationships.
7.2
Branching diagrams show biological relationships.
cladogram
moss
fern
pine tree
flowering plant
derived characteristic
flowers
seeds
vascular system
multicellular
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6. Classification systems change as scientists learn more.
7.3
Classification systems change as scientists learn more.
CALIFORNIA
Content Standards
7.3.d Students know how to construct a simple branching diagram to classify living groups of organisms by shared derived characteristics and how to expand the diagram to include fossil organisms.
domain
vertebrate
invertebrate
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7. Classification systems change as scientists learn more.
7.3
Classification systems change as scientists learn more.
The most popular system of classification in use today is a three-domain system that includes six kingdoms of organisms.
domain
vertebrate
CLASSIFICATION OF LIVING THINGS
invertebrate
Domain: Archaea
Domain: Bacteria
Domain: Eukarya
Kingdom: Archaea
Kingdom: Bacteria
Kingdom: Protista
Kingdom: Plantae
Kingdom: Fungi
Kingdom: Animalia
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8. 7.1 Scientists develop systems for classifying living things.
I. Scientists develop systems for classifying living things.
dichotomous key
classification
A. Scientists provide a key for identifying species.
taxonomy
B. Linnaeus named more than 11,000 species.
binomial nomenclature
1. Classification and Taxonomy
2. Using Classification
genus
3. Naming Species
C. Organisms can be classified into seven levels.
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KEY CONCEPT
SUMMARY

9. Branching diagrams show biological relationships.
7.2
Branching diagrams show biological relationships.
II. Branching diagrams show biological relationships.
cladogram
A. Taxonomists study biological relationships.
derived characteristic
1. Physical Evidence
2. Genetic Evidence
B. Branching diagrams show how organisms evolved.
1. Common Ancestors
2. Diagramming Taxa
3. Cladograms
C. Branching diagrams help scientists test their hypotheses.
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KEY CONCEPT
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10. 7.3 Classification systems change as scientists learn more.
III. Classification systems change as scientists learn more.
domain
A. Taxonomy changes as scientists make discoveries.
Plantae
1. Three Domains
Animalia
2. Six Kingdoms
Protista
B. The two most familiar kingdoms are plants and animals.
Fungi
1. Plantae
Archaea
2. Animalia
Bacteria
C. Other organisms make up four more kingdoms.
1. Protista
2. Fungi
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3. Bacteria
4. Archaea
KEY CONCEPT
SUMMARY

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