It depends on the organism, they all vary, they can reach up to 90% but I’m not sure so pick C:70%
The correct answer is: [B]: "beneficial" .
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{<u>Note:</u> A symbiotic relationship known as "mutualism" — in which both organisms benefit.}.
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Alcohol,nicotine, and caffeine.
<span>nerve cells need b 12 for proper functioning</span>
