Ecosystems need producers because they are the start of the food chain.
Producers are consumed by first consumers, the second consumers and so on.
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Are you asking what factors effect mutation rate?
If you are could you be a little more specific because technically even you just damaging tissue increases the likelihood of a mutation occurring due to mitosis occurring to repair the destroyed cells. So every time you have to replicate DNA you’re at risk an increased risk for mutation assuming it was the result of something like a cut.
sorry I have to go
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Water isn't wet by itself, but it makes other materials wet when it sticks to the surface of them.
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The Sámi people are an indigenous people of Northern Europe inhabiting Sápmi, which today encompasses northern parts of Sweden, Norway, Finland and the Kola Peninsula of Russia.If this helps mark me brainliest.Thanks.