Think it could be C or D but I think it's more D
<span>Population sizes decrease at higher trophic levels.
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<span>Pathogenic bacteria found in gastrointestinal tracts. </span>It's a <span>probiotic bacterium.
I hope this helps;)
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Answer:
The chemical nature of the substance does not change.
Explanation:
The chemical nature of the substance does not change.
