PLEASE HELP Explain how cells are able to differentiate and how is cell is able to tell when a specific gene should be produced before translation occurs. Use the following terms in your answer DNA, gene expression, proteins, transcription factors, RNA polymerase.

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thinking it would be physical characteristics

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.