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.
Lionel C. Sternberger is believed to have invented the âcheese hamburgerâ in the 1920s in the Northeast portion of Los Angeles County. Tales differ, however, as to precisely when this occurred, and where. Some peg the date as 1924, others as 1926.