Mr. Parks walks and runs a distance of 100 m between 2 Trials. What is true of his Work? He did more work walking 100 m
He did more work running 100 m
He did the same amount of work both times
The amount of Work he did is determined by the amount of time it took him

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.

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physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."