Homeostasis is maintained by which of the following?
diffusion of molecules from an area of high concentration to lower
osmosis of water into an area of high solute concentration
active transport of molecules to an area of high concentration
all of the above

Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond. electronegativity difference of c and c: ionic covalent electronegativity difference of mg and cl: ionic covalent