suggest why it is important to compare the change in length rather that the final lengths of the potato sticks in this type of investigation

answer; ///i believe the answer is (antioxidant);

not sure if this is what you'r looking for eubacteria and archaebacteria

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