Biology 8th Edition by Kenneth Mason ,Jonathan Losos,Susan Singer,Peter Raven,George Johnson

تمرين 16

Which of the following best describes a morphogen
A) A cell that secretes a diffusible signal that specifi es cell fate
B) A diffusible signal that functions to determine cell fate
C) A protein that helps mediate cell-cell interactions, altering cell fate
D) A protein that allows a cell to become totipotent