<-a picture of mutualism
Symbiois is a close relationship between two organisms in which one organism lives near, on or even aside another organism, and the organisms benefit. This happens everywhere and all the time. There are three types of of symbiotic relationships. One type is commensalism, this is when one of the organisms benefit and the other is not harmed. An example of commensalism is when there barnacles on a whale. The barnacles have a place to grow and the whales don't seem to mind. The second is mutualism, that is when both organisms benefit from each other. Mutualism would be a clown fish and an anemone. The clown fish would get safety and have shelter; meanwhile the fish will attract others the anemone which it can feed of. Parasitism is when one organism gains while the other gets harmed. a pine tree and a woodpecker would be an example of parasitism because the woodpecker will get food from the tree. However, the tree will suffer from diseases and will weaken. Symbiotic relationships are important to life in my opinion and we can can notice multiple relationships while just out on a walk.
http://www.poliz.de/starship/sciencenew/symbiois.htm
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