An embryo grows into a multicellular organism made of a wide variety of cell types. how does the variation in cell types occur?

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What are levels of ecology and how can we remember them

The scales shown in the introduction measure mass, or the amount of matter in a particular object. the scientific law of conservation of mass states that matter cannot be created or destroyed during a chemical reaction, but it can change from one form to another. did the simulation support this scientific law? explain why or why not.