Answer:
Enzyme catalysis is detected by measuring either the appearance of product or disappearance of reactants. To measure something, you must be able to see it. Enzyme assays are tests developed to measure enzyme activity by measuring the change in concentration of a detectable substance.
Answer:
it might be D.
Explanation:
I honestly am going off of what I can remember in school.
Nervous system is divided into parasympathetic and sympathetic