Not sure if I'm correct but my best guess is the cell membrane seeing as it surrounds the cell itself and is responsible for allowing certain molecules to diffuse in or out of the cell. Good Luck! :)
B) Cell Membrane (Hope that helps)
The main function of carbohydrates is:
B. <u>Storing energy</u>
Answer:
igneous rock
Explanation:
Look at the chart metamorphic rock melts turning into magma magma solidifies into IGNEOUS ROCK