What did chargaff discover while studying bases in the dna of organisms? the bases in the dna of each organism were unique. the ratios of thymine and adenine were similar, as were the ratios of guanine and cytosine. the overall percentages of bases were different from one organism to the next. there were equal amounts of all four bases in every organism, or 25 percent of each base

B

Explanation:

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.