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"Classifying Organisms" (pgs 16-23) (The Naming System of…
"Classifying Organisms" (pgs 16-23)
Why do Scientists Classify?
There are more than one million kinds of organisms
The scientific study of how living things are classified is call taxonomy
once an organism is identified, you know more
Classification
Its the process of grouping things based on similarities
Biologists use classification to organize living thingss into groups
so that the organisms are easier to study
The Naming System of Linnaeus
Genus
A group that cointains similar organisms
So cat, pumas, house cats
All in the same Genus
Species
A group of similar organisms that can mate with each other
A Swedish guy came up with the idea that we can classify things based on what they look like
Using Binomial Nomenclature
It makes it easier for scientists to communicate about an organism because everyone uses scientific name for the same organism
So you have to make complex latin names for organisms
Taxonomic Keys
Taxonomic keys are useful tools for determining the identity of organisms.
It consists of a series of paired statements
Levels of Classification
The Major Levels of Classification
There are eight levels or classification for organisms
Highest is Domain
then Kingdom
Then Phylum
Then Class
Then Order
Then Family
1 more item...
The more classification levels that two organisms share, the more characteristics they have in common
Evolution and Classification
Darwins Theory
Darwin found that some species of finches were similar to each other but different from finches living in South America
Classification today
Classification has changed the way biologists think about classification
Species with similar evolutionary histories are classified more classified more closely together
Determining Evolutionary History