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

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.