Dichotomous  Key

Making a choice to determine someone or something's identitity
You have two statements and then make a choice.
Is it this or that?
If it is this then is it one or two?
If it is two then it it three or four?
And on until figure out where it fits in the line or its identity.
Helps organize species.

http://www.enchantedlearning.com/subjects/plants/activity/key.shtml

http://en.wikibooks.org/wiki/Dichotomous_Key

http://biology.wisc.edu/documents/dichotomous_key.pdf

http://www.amaisd.org/sites/nheights/dichotomous_key.htm

Example of a Dichotomous Key
http://dnr.wi.gov/org/caer/ce/eek/veg/treekey/index.htm

http://www.biologycorner.com/worksheets/dichoto.html

http://www.biologycorner.com/worksheets/pamishan.html

http://www.nclark.net/Classification

http://www.smithlifescience.com/FishCoralReefDichotomousKey.htm

http://dnr.wi.gov/org/caer/ce/eek/critter/watercritter/critterindex.htm