What is the rna world hypothesis and why is it called that?

barrio is a spanish word meaning neighborhood. in spain, several latin american countries and the philippines, the term is also used officially to denote a division of a municipality while a ghetto is a part of a city in which members of a minority group live, typically as a result of social, legal, or economic pressure. the term may have originally been used in venice to describe the part of the city to which jews were restricted and segregated.