Hydrogen bonds between water molecules are than covalent bonds.

Weaker

Explanation:

Without any other context, i'm going to assume that this is comparing the strength of Van der Waals force and covalent bonds.

Van der Waals forces are inter-molecular forces generated because of the polar nature of the water molecule. These are weaker than intra-molecular covalent bonds (which involve sharing of electrons)

answer; ///i believe the correct answer is (aids) acquired immune deficiency syndrome;

cell regulation is conducted by special proteins.