The oceans absorb carbon through three processes that draw atmospheric carbon dioxide into the oceans: the physical carbon pump, the biological carbon pump and the carbonate pump. molecules of co2 enter the ocean by diffusing into the sea surface waters and dissolving as part of the physical carbon pump. all but one variable influences how much co2 will diffuse in any given location. that is a) wind. b) salinity. c) water temperature. d) geographic location.

What is the significance of the protein-lined pits? a. protein attracts other proteins needed for atp synthesis within the cell. b. protein-lined pits are able to transport one molecule at a time down the concentration gradient within the cell. c. the polarity of proteins allows other polar molecules to attach and be transported in the cell by transport channels. d. receptors within the pits allow ligands to fuse and be transported into the cell by endocytosis.