How are phone numbers in a phone book classified? When you are looking for someone's phone number , do you have to look through everybody's name to tind the number?

There are usually categories for names and the categories are sorted in alphabetical order. But nowadays phone books only are used for businesses and all that

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.