Which structure is/are not part of the amniote egg?

Question

Quizplus · Accepted Answer

Bone is not part of the amniote egg. The amniote egg contains extraembryonic membranes (including the amnion and the chorion), yolk, and a shell. The shell is typically composed of calcium carbonate and provides protection and support for the developing embryo. The yolk contains nutrients to support the developing embryo, and the extraembryonic membranes help to maintain a stable environment for the embryo within the egg. While bone is an important feature of many amniotic animals (such as reptiles, birds, and some mammals), it is not part of the amniote egg itself.

Which Structure Is/are Not Part of the Amniote Egg