5th Grade Lesson Plan: Ecosystems
Other plants and animals live side-by-side in a relationship we call symbiosis. There are dif-ferent kinds of symbiosis. The first is called parasitism. This is where one species (the parasite) feeds off of or is depen-dent on the other species (the host) in a way that may hurt or even kill the host. An example of parasitism is fleas on a dog.
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