Answer: d. assimilating the nitrogen into their own biomolecules.
Explanation: I just had this question for an assignment.
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Answer: A. Speed
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They're called Enzyme. They're made up of proteins. They act as a biological catalysts that can speed up chemical reaction. They have an active site that certain substrates binds into it and form a product. Enzyme works under optimum pH and temperature and the active sites are not changed unless denatured.
My freind the correct anwer is the 18th amendment
