2. LIVING RELATIONSHIPS SYMBIOSIS

3. Other Nutritional Relationships: SYMBIOSIS - Any close relationship between two organisms of different species

4. COMMENSALISM Benefits one organism; the other organism neither benefits nor is harmed This is an example of the cattle egret and a rhinoceros The cattle egret feeds off the insects stirred up when the rhino moves. The text mentions the red- breasted goose and the peregrine falcon

5. PARASITISM Benefits one organism; the other (host) is harmed This example is a braconid wasp which lays its eggs on a tomato hornworm caterpillar. The wasp lays its eggs on the hornworm. When they hatch, they digest the hornworm from the inside. Other examples are fleas, ticks, tapeworms, nematodes

6. MUTUALISM Both organisms benefit Here, there are ants that live in the acacia tree. The acacia tree produces nectar “gifts” for the ants. In return, the ants protect the tree from any plant-eating insects. Another example is the tunneling shrimp and the goby fish.

7. Symbiotic Relationships RelationshipSpecies #1Species #2 Commensalism +0 Parasitism +- Mutualism ++