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.
Apparently, the rolls were used as a serving implement because the white gloves typically given to customers to handle the sausages kept getting stolen. 2. CHEESEBURGER: PASADENA, CA â 1926 Hamburgers were based on meat patties eaten by nomadic Mongols under Genghis Khan in the 12th century. The humble cheeseburger, however, owes its inception to a cheeky, 16-year-old kid in Pasadena. Back in 1926, Lionel Sternberger, the son of the owner of a little sandwich joint called The Rite Spot, decided to slap a piece of American cheese on top of a burger patty as it was frying.