Regents Biology Classification

Regents Biology Classification  System to organize all living creatures  plants  animals  microbes  etc.  Nowadays we can use DNA and protein sequencing to help us see similarities

Regents Biology Organizing the world of organsims  The Tree of Life  organize creatures by structure & function  how they are built  how they live  organize them into groups of closely related creatures

Regents Biology Bacteria & Archaebacteria Classification  6 Kingdom system  Prokaryotes  No separate organelles in their cells  Bacteria  Archaebacteria  Eukaryotes  Separate organelles in their cells  Protists  Plants  Fungi  Animals Prokaryote Eukaryote

Regents Biology Kingdom Protist Kingdom Fungi Kingdom Plant Kingdom Animal Kingdom Archaebacteria Kingdom Bacteria Prokaryotes Eukaryotes

Regents Biology Classification  Kingdom  Phylum  Class  Order  Family  Genus  species

Regents Biology Carolus Linnaeus  The Linnean system  proposed in 1700s  each species has a 2 part name  genus  species Homo sapiens

Regents Biology Latin binomial  2 part scientific name  Genus — larger group to which organism belongs  always capitalized  species — specific name for that organism  always lowercase  example: Linnaeus named humans Homo sapiens  means “wise man” — perhaps in a show of hope & optimism

Regents Biology Genus groupings  Classify organisms into broader groups  Species that are closely related are grouped into the same genus  LeopardPanthera pardus  African lion Panthera leo  Tiger Panthera tigris

Regents Biology Orders & families

Regents Biology Why not use common names?  Misleading  starfish  dragonfly  Confusing  blue jay, blue coat, corn thief  dog, perro, chien I swim, but I’m still a bird!

Regents Biology Why not use common names?  But they all have only one scientific name! Cyanocitta cristata Pyrrhosoma nymphula Pisaster ochraceus

Regents Biology Any Questions?