http://utahscience.oremjr.alpine.k12.ut.us/sciber00/7th/classify/living/2.htm
http://www.fi.edu/tfi/units/life/
Define characteristics of living things
2 answers
http://www.cliffsnotes.com/WileyCDA/CliffsReviewTopic/Characteristics-of-Living-Things.topicArticleId-8741,articleId-8578.html