Prohibition in the United States was a nationwide constitutional ban on the sale, production, importation, and transportation of alcoholic beverages that remained in place from 1920 to 1933.rohibition was mandated under the Eighteenth Amendment to the United States Constitution. Enabling legislation, known as the Volstead Act, set down the rules for enforcing the ban and defined the types of alcoholic beverages that were prohibited. For example, religious uses of wine were allowed.
Relaying sound waves is the function of a  frog's tympanum.    Specifically, the term describes a structure which is located on  the outside of some amphibians, insects and mammals. In frogs, it  is found just behind the frog's eye.
A Frogâs Tympanum. A frogâs tympanic membrane, or tympanum, is the circular patch of skin directly behind its eye that we commonly call its eardrum. It functions much like our eardrum does âthe tympanum transmits sound waves to the middle and inner ear, allowing a frog to hear both in the air and below water. In addition, this membrane serves to keep water and debris from entering a frogâs ears.