2.  It literally means “together life”. It refers to organisms that live in close approximation; often they cannot live without each other.  Top flap)

3.  Relationship in which one organism (the host) is the source of food and/or shelter for the organism (the parasite)  *Parasite benefits/ Host is harmed*  Examples:  Tick feeding on blood of a dog  Head lice on human scalp  Tape worm in intestines  Mistletoe putting roots into host tree. http://www.youtube.com/watch?v=5d DjmkWojE8

4.  Neither species is hurt in anyway, they both receive a benefit from the relationship.  *Both Benefit*  Examples:  Bees and Flowers  Bacteria living in cow’s intestines, help break down cellulose.  Honey guide bird leads honey badger to honey, they both eat.

5.  One organism benefits from the relationship while the other is neither helped or harmed.  *one benefits/one not helped or harmed*  Examples:  Barnacles living on a whale  Remoras attach themselves to a sharks body. They eat sharks food scraps and have protection.

6. Mutualism

7. Parasitism

8. Mutualism

9. Commensalism

10. Parasitism

11. Commensalism

12. Mutualism