Jennifer wants to do a scientific investigation, and has already chosen her question. now, she needs to collect information from a) reliable internet sites b) published journals c) books d) all of these

cell differentiation  is how generic embryonic  cells  become specialized  cells. this occurs  through a process called gene expression. gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a  cell  functions.

explanation: