Taxonomy And Classification - Introductory Biology - Quiz Pdf 1h3k2v

Biology Taxonomy and Classification

Name: ______________________

Why Classify?  _________________________ million species on Earth  Less than ___ million have been identified and named  _________________, ___________________ have lots of unidentified species  Need a way to organize to make organisms easier to identify and relationships easier to

understand What are Classification and Taxonomy  Classification – grouping based on __________________________  Taxonomy – branch of biology concerned with the _______________ and _________________ of organisms. History of Classification  ____________________________  First to Classify living things  Two major groups - ________________________________  Within these groups, organisms were organized based on where they lived  Doesn’t work  Some live in both land and water  Does NOT show relationships among organisms  __________________________________________  1707 – 1778  Based classification system on ____________________ characteristics  Came up with ____________________________________________  System of naming  ____ words – gives species name  Genus  Group of _____________________ related species  Second word is descriptive  Example – Homo sapiens ("wise" man); Canis domesticus Why Latin?  __________ Language  Never changes  Consistent Characteristics Used by Taxonomists to Classify Organisms  External and internal structures (___________________________)  Chemical make up  ______________________________  Proteins  Evolutionary relationships

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How Our Classification System Works  Organisms are grouped into a series of categories – ________________________  The taxa are:  ______________________ – ________________, most _____________ group/taxon  ______________________  ______________________  ______________________  ______________________  ______________________  ______________________ – ________________, most ______________ group/taxon Names and Classification show Relationships  ______________ – Lynx rufus  ______________ – Lynx canadensis  Bobcat and Lynx belong to the same ___________________  Their classification:  Kingdom _____________________________  Phylum ______________________________  Class _______________________________  Order _______________________________  Family ______________________________  Genus _______________________________ How are relationships determined?  Fossil History and Comparison 

Structures of modern organisms are ______________ with those of ___________

 _______________________________  Embryonic/larval forms of species can reveal relationships and suggest common origin  Biochemistry  The more ___________________ sequences OR _________________ sequences that are

shared by two species, the more ______________________________________ they are  This is the BEST way to determine relationships

__________________________________ __________________________________  _______________________________ Mating calls and other behaviors lead to reproductive isolation and are used to identify species  Finally…an evolutionary history is determined  ________________________ is created  A "___________________________________"  Shows ________________________________________________ of a species  

Our 6 Kingdom System ______________________ ______________________ ______________________ ______________________ ______________________ ______________________

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 6 kingdoms determined by  Characteristics of _________________  How they obtain __________________

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