Awaste-spark-type ignition system a. fires two spark plugs at the same time b. fires one spark lug with reverse polarity c. fires one spark plug with straight polarity d. all of the above

c.more precipitation,but only when emission levels.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products

the answer is :

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