No. Many, in fact most eggs are not fertilized and are therefore not viable.
the developing embryo is nourished by yolk
There is a embryo in the egg.
fertilized egg,embryo, and fetus
It gives the embryo oxygen it needs to survive in the egg.
Embryo is formed in germinal spot of yolk .
When a hen lays a fertilized egg, there is no embryo inside. Embryo's only start to form once they are incubated.
It is to protect the embryo inside the egg.
An egg.
Yes that is possible, it has happened twice to me!
The embryo of a chicken egg is right below the shell.
The egg yolk is the part of the egg which feeds the developing embryo. The egg white protects the egg yolk and and provides additional nutrition for the growth of the embryo.
The endosperm does. It acts much like yolk in an egg does for the embryo developing in the egg: provides the necessary nutrients for the developing embryo to grow from.