You may use the following websites to assist you in choosing an organism: 
http://www.perspective.com/nature/animalia/ 
http://www.kidport.com/reflib/science/animals/animals.htm 
http://www.biosis.org/free_resources/classifn/classifn.html 
http://animaldiversity.ummz.umich.edu/ 
http://tolweb.org/tree?group=life&contgroup= 

To obtain information for the Research Worksheet, go to one of the following websites and type the name of your organism in the search box.  
http://www.ncbi.nlm.nih.gov/Taxonomy/ 
http://www.sp2000.org/ 

To obtain additional information for the Research Worksheet, use the above websites and those listed below to identify characteristics of your organism.  The websites listed in Step 1 are good sources of information.