Why do cells of different organisms have a similar structure? Why are the cells of different organisms

Why do cells of different organisms have a similar structure? Why are the cells of different organisms different from each other?

Most living things are made up of different types of cells, specialized for different functions. For example, a liver cell does not have the same biochemical functions as a nerve cell. However, every cell in the body has the same set of genetic instructions, so how could different types of cells have such different structures and biochemical functions? Since biochemical function is mainly determined by specific enzymes (proteins), different types of genes must be turned on and off in different types of cells. This is how cells differentiate.



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