it is a penguin in which lives in Antarctica
The primary function of a developing bird egg is to provide a safe environment for the embryo to grow and develop. The eggshell protects the embryo from outside harm, while the egg contents provide all the necessary nutrients for growth until the chick is ready to hatch.
Bird eggs have hard shells to protect the developing embryo inside from physical damage and predators. The shell is made of calcium carbonate, which provides strength while still allowing oxygen and carbon dioxide to pass through for embryo development.
The bird embryo develops inside the protective shell of the egg, using the egg yolk as a source of energy and materials from which it will develop.
There is an embryo within the bird's reproductive track. This embryo eventually receives a tough calcium shell that hardens just before the bird is ready to lay the egg.
There is an embryo within the bird's reproductive track. This embryo eventually receives a tough calcium shell that hardens just before the bird is ready to lay the egg.
They have a soft shell - which is porous to allow oxygen and moisture to penetrate into the developing embryo.
It takes about one day.
Bird eggs have a hard outer shell composed of calcium carbonate that protects the developing embryo. Inside the shell, there are membranes and albumen (egg white) that provide nutrients and support for the embryo. After the eggs are laid, the female bird will typically incubate them by sitting on the nest to keep them warm until they hatch.
Initial development of the egg, including the embryo, begins inside the mother bird after she mates with a male. The embryo, yolk, and shell initially form together. After the egg is laid the bird embryo continues to grow, drawing the nutrients it needs from the yolk.
Bird eggs are adapted to land by having a hard outer shell that protects the growing embryo from damage and dehydration. The shape of the egg also helps prevent it from rolling away and provides structural support for the developing bird. Additionally, the eggs have a membrane inside the shell that allows for gas exchange to occur while protecting the embryo.
The primary function - is to contain the developing embryo and its nutritional yolk-sac until the foetus is ready to emerge. That applies whether it's a hard-shelled egg like a bird, or a soft-shell like a reptile.