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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