Describe the structure of cell membrane using fluid mosaic model

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."

ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called