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Classifying organisms (Evolution of classification (Classification today…
Classifying organisms
Evolution of classification
Darwin’s theory
He hypotthesized that some members in a single species of finches flew from South America to the Galápagos Islands
Classification today
Scientists now understand that species come from a common ancestor
Darwin really helped develop this theory
Determining eveolutionary history
Scientists rely on the chemical make-up of an organisms cell to determain the history of the species
New information
Sometimes when studying the cells scientists find new information on the species
Why do scientists classify?
It is easier to find information because it is organised
It makes the organisms easier to study
Sorts things based on simmilarites
Taxonomic keys
Useful tools for determaining the identity of organisms
A series of paired statements
Field guides also work but may be more difficult
The naming system of Linnaeus
Genus and species
The first part in an organisms scientific name
A species is a group of similar organisms that can reproduce and produce offspring that can also reproduce
Using binomial nomenclature
Latin words are used
Only one scientific name but there can be many non scientific names
Levels of classification
The major levels of classification
Organisms are not grouped by where they live
The classifications are narrowed down from something very broad and get more detailed as the list goes down
Classifying an owl
Many other oragainsims belong to the same domain as an own
As the chart goes on there are fewer kinds of organisms in each group