The document defines and provides examples of different types of symbiotic relationships between organisms: mutualism, in which both organisms benefit; commensalism, where one benefits while the other is unaffected; and parasitism, where one benefits while harming the other. Examples include acacia plants providing nectar to ants in exchange for protection, moray eels getting clean mouths from cleaner fish, and cattle egrets eating insects stirred up by cattle.

3. Parasitism Mutualism Commensalism both organisms benefit one organism benefits (parasite) one organism benefits one organism is unaffected one organism is harmed (host)

4. Mutualism: both benefit Example 1: Acacia plant with ants Ants protect plant from herbivores and kill any plants that start to grow near the Acacia Acacia makes nectar for ants to eat

5. Example 2: Moray Eel with Cleaner Fish Moray Eel gets a clean mouth Cleaner Fish gets a meal

6. Commensalism: one benefits, one is unaffected Example 3: Cattle with cattle egrets Cattle stir up insects as they eat grass Egrets hang around and eat insects

7. Commensalism: one benefits, one is unaffected Example 4: Clown fish with anemone Clown fish gets protection Anemone is probably unaffected

8. Example 5: Antelope with Oxbird Antelope gets rid of it’s parasites Oxbird gets a meal

9. Parasitism: one benefits, one is harmed Example 6: Taenia worm in human eye Worm infects human blood stream Human may go blind