I always believed that the egg yolk supplies food for the growing chick inside the egg shell. Is that true, and if it is, what is the egg white for? :confused:

The egg yolk if fertalized becomes the chicken. The "white" is similar to the amneotic fluid in the human, it supplies the nutrients for growth.

Agrees with J_9 - the yolk becomes the chicken and the whites are the nourishment for the chick. But, as J_9 stated, the yolk needs to be fertilized in order for the process to begin.