Which of these is a function of all cells? A. to absorb nutrients and gases from blood B. to extract energy from food to sustain life C. to produce food using water and carbon dioxide D. to give shape and structural support to an organism

the sphincter muscles at the end of the digestive tract is the anus.

hi my name is ashlynn and im 15

these macromolecules could either be amino acids, proteins or nucleic acids. they are responsible for the chemical changes and reactions that affects largely the cell and its composition. take for instance the cytoplasm of the cell where these organelles are settled. these simple organelles are composed of macromolecules which ignites and catalyses different functions that enables cells, in macro-perspective in motion and metabolism. in intestines for example, metabolism happens and breaking down parts of a food to simpler compounds that are used and these nutrients delivered throughout the body and again broken down by into smaller components.