Classification of living things
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Classification of Living Things. Why Classify?. Scientific Names are dependable and universally accepted !. Carolus Linnaeus – 1707-1778. Our system is based on his work. Heirarchical system – 7 levels. Seven Levels of Classification. 1. Kingdom 2. Phylum 3. Class 4. Order

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Classification of Living Things

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Classification of living things

Classification of Living Things


Why classify

Why Classify?

Scientific Names are dependable and universally accepted!


Carolus linnaeus 1707 1778

Carolus Linnaeus – 1707-1778

Our system is based on his work.

Heirarchical system –

7 levels.


Seven levels of classification

Seven Levels of Classification

1. Kingdom

2. Phylum

3. Class

4. Order

5. Family

6. Genus

7. Species

Most broad

Most specific


Naming organisms

Naming Organisms

Genus species

Called Binomial Nomenclature!

Examples:

Homo sapiens –

Human


What characteristics are used

What characteristics are used?

- Similar structures

- Evolutionary relationships

- “Derived characters” – new characteristics that are evolutionary innovations

Derived characteristics are used in cladograms.


Cladogram

Cladogram


Comparative anatomy

Comparative Anatomy

Turtle Human Horse Bird Bat Seal


Human coccyx and monkey tail

Human Coccyx and Monkey Tail


Molecular biology

Molecular Biology


Comparative embryology

Comparative Embryology

CHICK

HUMAN


Dichotomous keys

Dichotomous Keys

  • written set of choices that leads to the name of an organism

  • Used to indentify unknown organisms


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