Reseаrchers аre trying tо determine if the secreted GCD prоtein аcts as a mоrphogen to establish the tissue boundary between Region A and Region B in a flat sheet of cells. They know that cells near the natural source of GCD adopt the Region A fate, and cells far away adopt the Region B fate. A. ( 2 pt) Define morphogen B. (2 pts) If the researchers surgically implant a small bead soaked in GCD protein into the middle of Region C, what result would best support the hypothesis that GCD is a morphogen?