Why does sodium chloride cannot conduct electricity in its solid form? A. ions in its structure are in fixed positions.

b. It contains no free electrons.

c. It has a giant covalent molecular structure.

d. Ions in its structure only have single negative and single positive charges.

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:

the five characteristics of adolescence are biological growth and development, and undefined status, increased decision making, increased pressure and the search of self.