A Protein Becomes Distributed in a Gradient Along the Length

Multiple Choice

A protein becomes distributed in a gradient along the length of the egg. As development continues, orientation of this gradient determines which part of the embryo will become the front of the animal, and which will be the back. This is an example of ____.

A) germ layer formation
B) gastrulation
C) gradient development
D) embryonic induction
E) gene expression