Ciliate conjugation is a sexual phenomenon that results in genetic recombination and nuclear reorganization within the cell. In most ciliate groups, however, the cells separate after conjugation, and both form new macronuclei from their micronuclei.
Before the bun, hamburgers are said to have been served between two pieces of bread. In fact, a ground beef patty was known as Hamburger steak (first mentioned in an American cookbook in 1891); when this was put between bread or in a bun it was called a Hamburger sandwich.
There are currently three major claims staked on the confusing and contradictory map of American hamburger history. Each has its adherents and detractors. They are: Louis' Lunch: This New Haven, Connecticut, burger joint claims to have invented our favorite lunchtime (and dinnertime) meal in 1900. From its website: One day in the year 1900 a man dashed into a small New Haven luncheonette and asked for a quick meal that he could eat on the run.