It is called cell differentiation this makes embryonic cells would become specialized cells. This occurs threw a process that is called gene expression
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the best one is to wash your hands. you can also not touch your face as much. this will help stop the spread of germs.
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How do insects become resistant to pesticide? ... Upon exposure to insecticides, insects that do not carry the resistance genes die, thus allowing the individuals with the resistance genes to survive and reproduce, creating more resistant insects. With every generation the number of resistant insects increase.
