Which surface of the maxillary bones fuse together

cell regulation is conducted by special proteins.

i got something better   a catchphrase here it is

ahem  

ahem

what the squwock

explanation:

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