Shops that use barcode readers may generate receipts with a barcode of the receipt identification number, that enables a salesperson to scan the barcode and quickly retrieve the details of the original transaction, for example if a customer seeks to return or exchange goods or there is some other query.
Both ovaries do not release mature eggs at the same time. Only one egg is, suppose, to be released each month by one of the ovaries, not both. If both ovaries release two matuâ¦re eggs and they are then fertilized, fraternal twins will be conceived.
An Egg a Day is Work. If you think laying an egg is easy, think again! Robins lay only one egg per day for good reasons. Female birds have one working ovary, unlike mammals, which have two. Ovaries are the organs where eggs are produced. A bird's ovary looks like a tiny bunch of different-sized grapes.