Final answer:
Eggs are the female gametes formed in the ovaries and are central to the reproductive process, becoming fully developed during a woman's reproductive years. Bird eggs can be purchased in egg cartons for protection, unrelated to the biological context. Embryo development varies among vertebrates, taking place inside or outside the mother's body.
Step-by-step explanation:
When we talk about eggs, we refer to female gametes that are crucial in the process of reproduction. In humans, eggs form in the ovaries and are released into the fallopian tubes during ovulation. Before a baby girl is even born, her ovaries contain immature eggs, which become fully developed following puberty, when each month, typically one egg matures and is released.
In context to the forms in which bird eggs can be purchased, they may not be exactly relevant to the biological process, but more related to the commercial and practical aspects of how eggs are sold. Often, they are available in egg cartons, which are designed to protect the eggs during transport.
Other items such as packing peanuts, disposable cups, plates, trays, and cutlery; and disposable take-away containers do not relate directly to the biological concept of eggs but are materials involved in packaging and convenience related to food products.
To address the question of whether the embryo develops in the mother or in an egg, it depends on the type of vertebrate. Some vertebrates, like birds, lay eggs and the embryos develop outside the mother's body; while in humans, the embryo develops inside the mother's womb after the process of fertilization.