A scientific law requires that all observations and experiments verity the theory? true or false

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;

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