Easy. HISTORY or GEOGRAPHY books of specific areas you want to know more about.
That students who study make better grades than those who do not.
I believe that an adjuvant is a chemical addictive that increases the effectiveness of vaccines. It is a pharmacological or immunological agent that modifies the effect of other agents. It may be added to a vaccine to modify the immune response by boosting it such as to give a higher amount of antibodies and a longer lasting protection, and hence minimizing the amount of the foreign material or vaccine injected.
An arrangement of genes consisting of an operator, a promoter, and a repressor is an OPERON.
