Section 4: How are Living Things Classified
Section 4: How are Living Things Classified?
Classify mean...
__________ is the study of classification.
The History of Classification
Aristotle:
Linnaeus:
Today’s System:
• Uses ______________ or the evolutionary history of an organism
• Organisms with similar ____________ and ____________ features are grouped closely together.
• The more levels two organisms share, the more similar they are.
Levels of Classification
Scientific Names:
• _______________________ is a system using a 2-part name
▪ 1st part: __________--contains similar organisms that are closely related
▪ 2nd part: __________--organisms that can mate and reproduce fertile offspring in nature
• How to write them…
1. Write it in _______ OR _____________.
2. __________ name goes FIRST and is _______________.
3. __________ name goes SECOND and begins with a lower case letter.
EXAMPLE: Felis catus OR Felis catus
• Why you need them…
Tools to Identify Organisms:
▪ Field guides
▪ Dichotomous (Taxonomic) Keys:
Can you make a key to classify the following organisms?
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