Tuesday, October 21, 2014



Symbiosis: is the relationship of two different species that live together and how they affect each other.

There are three types of symbiosis: mutualism, commensalism, and parasitism.

Mutualism: when the relationship of the species benefits both species. For example, the relationship of a dog and a human because the dog gets taken care of, fed and kept healthy and the human gets company, exercise and a protection.

Commensalism: when the relationship of the species only benefits one of the and nothing happens to the other species . For example, the relationship of sharks and small fish called remoras because they stick to a shark to travel and when the shark kills something the remoras eat scraps. It benefits the remoras but nothing happens to the shark.

Parasitism: when the relationship benefits one of the species and harms the other. For example, the relationship of a lettuce and a worm. It benefits the worm because it gets food easily but the lettuce gets bitten so it starts to rot and dies.

This connects to what we have been doing in class because in class we have seen how species affect one another and population. This connects to population because when simbiosis happens species help each other survive or one species harms another and that affects the population in a ecosystem.

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