Commensalism
Commensalism is a relationship between organisms where one species benefits, and the other is neither hurt or helped. An example, as seen in the image below, is the clown fish and the anenamine. The clown fish lives in the annenimine, and provides it with shelter, but the aneenemine is not hurt or helped by this at all.
Mutualism
Mutualism is a relationship between organisms where both species benefit. An example, as seen in the image at the beginning and below, is a bee pollinating a flower. The bee is getting the pollen that they need and the flower is getting pollenated so that it can reproduce and grow more flowers, therefore both species benefitting from this.
Parasitism
Parasitism is a relationship between organisms where one organism (parasite) benefits and the other (host) is hurt.An example of this is a flea on a dog. The dog is being hurt when the flea bites and sucks its blood, but the flea is benefitting from the dogs blood because it is it's source for food.
Image from top of page is from wesite below:
http://best-bee-pollen-brand.com/what-is-bee-pollen-2
http://best-bee-pollen-brand.com/what-is-bee-pollen-2
Some information on this tab was found from:
http://www.marietta.edu/~biol/biomes/symbiosis.htm
http://www.marietta.edu/~biol/biomes/symbiosis.htm