Which model and explanation best represents the semiconservative nature of DNA? Par
Parel
Model A
Model B
Model A because one parental strand is conserved throughout the first and
second replication cycles.
Model B because both parental strands are completely conserved after the first
and second replication cycles.
Model A because the parental strands get split apart in the first replication but
are then rejoined in the second generation
Model B because both parental strands are completely conserved after the first
replication cycle but not after the second replication cycle.

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.

density and pressure