Characteristics of the cell wall include which of the following?

cellulose
phospholipids and protein
increased strength to the cell
selective membrane

the answer is:

carbon dioxide

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.

not only is it colder, it also becomes darker, less salty, and more dense.

the answer is c on e2020, bud.