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There are many functions that organisms have on an ecosystem. For instance, the hummingbirds and bees may be taking pollen from flowers for their own food, but the pollen that is still left on their beaks and legs can fall into other flowers causing the reproduction for flowers to make more flowers so they won't die off. Wild animals are also known to eat fruits and berries, and then dispose seeds through their waste later. Without the ecosystem, no organism, and likewise.

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Q: Why do ecosystems need organisms?
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