which statement correctly indicates the cell that is able to more efficiently exchange materials with the external environment and provides a correct explanation?

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

which fault and or fold did you find most difficult to diagram