What are the different types of “light” (electromagnetic waves), starting from radio waves? why do you think we can only see such a small portion of the electromagnetic spectrum? why don’t we see x-rays or microwaves?

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:

an electric circuit

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