1.what role do villi paly in the digestive system a. they increase the rate at which nutrients are absorbed b. they reduce the amount of nutrients lost in elimination c. they produce amylase which break down starch d. they produce bile which break down fatty foods

regulation of gene expression. gene expression can be regulated by various cellular processes with the aim to control the amount and nature of the expressed genes. these regulatory proteins bind to dna and send signals that indirectly control the rate of gene expression

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