4. what is one way that members of archaebacteria are different from members of eubacteria? a. they have different types of cell walls and cell membranes. b. they have many cells that do different tasks. c. they are single cells. d. they lack nuclei in their cells.

Archaea are sort of in between prokaryotes and eukaryotes. They do not have nuclei - in fact they have no organelles at all.

c. movement because i took the test and it lets me review my answers

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.