Commensalism is when two living organisms lives side-by-side with one not being effect and the other being effect. For example: the crwling/climbing moss the attaches its self the the trunks of tree and grows upwards so that they are able to get closer to the sun and get nutrients. Some moss or ivy kill the tree but this particulair moss does not.
Mutualism is where organisms live side by side effect each other in a benificial way. For example: Honey Bees and Flowers are benificial together. A flower needs to be poullonated to create more flowers. While Honey Bees need the pollen from the flowers to create the hives they live in. With out each other neither could live very long and both would die out.
Parasitism is where two organisms live side-by-side with one getting a benificial effect and the other being effect in a bad way, usually ending in death. For example: the tick is a type of insect that lives off of warm, still flowing blood. They attach themselves to another organisms and feed on its blood until the tick had eattin its fill. The chipmunck, a favorite of the tick, is the perfect victim for the tick. The tickk can easily attach its self to the chipmunck while it is in the trees or rooting around leaves for nuts. The chipmuncks hav just enough blood to stay alive long enough for the tick to get its fill then the tick fallls off and the chipmunck dies from blood loss.
